/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:12:03,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:12:03,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:12:03,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:12:03,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:12:03,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:12:03,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:12:03,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:12:03,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:12:03,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:12:03,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:12:03,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:12:03,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:12:03,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:12:03,243 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:12:03,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:12:03,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:12:03,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:12:03,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:12:03,245 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:12:03,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:12:03,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:12:03,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:12:03,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:12:03,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:12:03,529 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:12:03,531 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:12:03,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl [2021-06-05 05:12:03,532 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2021-06-05 05:12:03,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:12:03,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:12:03,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:12:03,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:12:03,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:12:03,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... [2021-06-05 05:12:03,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... [2021-06-05 05:12:03,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:12:03,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:12:03,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:12:03,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:12:03,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... [2021-06-05 05:12:03,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... [2021-06-05 05:12:03,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... [2021-06-05 05:12:03,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... [2021-06-05 05:12:03,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... [2021-06-05 05:12:03,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... [2021-06-05 05:12:03,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... [2021-06-05 05:12:03,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:12:03,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:12:03,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:12:03,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:12:03,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:12:03,651 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:12:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:12:03,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:12:03,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:12:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:12:03,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:12:03,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:12:03,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:12:03,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:12:03,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:12:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:12:03,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:12:03,653 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:12:03,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:12:03,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:12:03,653 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:12:03,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:12:03,801 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 05:12:03,801 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 05:12:03,801 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 05:12:03,802 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 05:12:03,802 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:12:03 BoogieIcfgContainer [2021-06-05 05:12:03,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:12:03,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:12:03,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:12:03,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:12:03,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:12:03" (1/2) ... [2021-06-05 05:12:03,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564cbb44 and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:12:03, skipping insertion in model container [2021-06-05 05:12:03,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:12:03" (2/2) ... [2021-06-05 05:12:03,807 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2021-06-05 05:12:03,811 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:12:03,811 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:12:03,811 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:12:03,811 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:12:03,895 INFO L149 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-06-05 05:12:03,908 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 05:12:03,920 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:12:03,920 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:12:03,920 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:12:03,920 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:12:03,920 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:12:03,921 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:12:03,921 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:12:03,921 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:12:03,926 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-06-05 05:12:03,940 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:12:03,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:03,947 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:03,947 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash 848381826, now seen corresponding path program 1 times [2021-06-05 05:12:03,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:03,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801905939] [2021-06-05 05:12:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:04,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801905939] [2021-06-05 05:12:04,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801905939] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:04,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:04,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:12:04,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281894031] [2021-06-05 05:12:04,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:12:04,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:04,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:12:04,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:12:04,138 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:04,178 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2021-06-05 05:12:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:12:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 05:12:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:04,187 INFO L225 Difference]: With dead ends: 253 [2021-06-05 05:12:04,187 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 05:12:04,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 05:12:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2021-06-05 05:12:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-06-05 05:12:04,221 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2021-06-05 05:12:04,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:04,222 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-06-05 05:12:04,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-06-05 05:12:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:12:04,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:04,223 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:04,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:12:04,224 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:04,224 INFO L82 PathProgramCache]: Analyzing trace with hash 890214852, now seen corresponding path program 2 times [2021-06-05 05:12:04,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:04,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395228369] [2021-06-05 05:12:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:04,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395228369] [2021-06-05 05:12:04,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395228369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:04,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:04,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:12:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095472367] [2021-06-05 05:12:04,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:12:04,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:12:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:12:04,262 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:04,309 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2021-06-05 05:12:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:12:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 05:12:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:04,313 INFO L225 Difference]: With dead ends: 262 [2021-06-05 05:12:04,313 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 05:12:04,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 05:12:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2021-06-05 05:12:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.923611111111111) internal successors, (421), 144 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2021-06-05 05:12:04,329 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2021-06-05 05:12:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:04,329 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2021-06-05 05:12:04,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2021-06-05 05:12:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:04,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:04,335 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:04,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:12:04,336 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1702344252, now seen corresponding path program 1 times [2021-06-05 05:12:04,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:04,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078229974] [2021-06-05 05:12:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:04,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078229974] [2021-06-05 05:12:04,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078229974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:04,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97768126] [2021-06-05 05:12:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:12:04,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97768126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:04,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:04,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:12:04,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828626215] [2021-06-05 05:12:04,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:12:04,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:12:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:12:04,569 INFO L87 Difference]: Start difference. First operand 145 states and 421 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:04,616 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2021-06-05 05:12:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:12:04,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:04,618 INFO L225 Difference]: With dead ends: 199 [2021-06-05 05:12:04,618 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 05:12:04,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:12:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 05:12:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2021-06-05 05:12:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0067567567567566) internal successors, (445), 148 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2021-06-05 05:12:04,626 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2021-06-05 05:12:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:04,626 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2021-06-05 05:12:04,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2021-06-05 05:12:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:04,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:04,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:04,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 05:12:04,844 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:04,844 INFO L82 PathProgramCache]: Analyzing trace with hash -735916285, now seen corresponding path program 1 times [2021-06-05 05:12:04,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:04,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951571037] [2021-06-05 05:12:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:04,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951571037] [2021-06-05 05:12:04,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951571037] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:04,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:04,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:12:04,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062486196] [2021-06-05 05:12:04,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:12:04,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:12:04,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:04,880 INFO L87 Difference]: Start difference. First operand 149 states and 445 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:04,933 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2021-06-05 05:12:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:12:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:04,935 INFO L225 Difference]: With dead ends: 246 [2021-06-05 05:12:04,935 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 05:12:04,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:12:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 05:12:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-06-05 05:12:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.901840490797546) internal successors, (473), 163 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2021-06-05 05:12:04,954 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2021-06-05 05:12:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:04,954 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2021-06-05 05:12:04,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2021-06-05 05:12:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:04,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:04,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:04,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:12:04,955 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:04,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1382578898, now seen corresponding path program 1 times [2021-06-05 05:12:04,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:04,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634335083] [2021-06-05 05:12:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:04,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:04,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634335083] [2021-06-05 05:12:04,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634335083] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:04,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:04,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:12:04,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059921017] [2021-06-05 05:12:04,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:12:04,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:04,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:12:04,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:12:04,969 INFO L87 Difference]: Start difference. First operand 164 states and 473 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:04,978 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2021-06-05 05:12:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:12:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:04,979 INFO L225 Difference]: With dead ends: 153 [2021-06-05 05:12:04,979 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 05:12:04,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:12:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 05:12:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-06-05 05:12:04,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.7954545454545454) internal successors, (369), 132 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2021-06-05 05:12:04,990 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2021-06-05 05:12:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:04,990 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2021-06-05 05:12:04,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2021-06-05 05:12:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:04,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:04,991 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:04,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:12:04,991 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:04,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969668, now seen corresponding path program 2 times [2021-06-05 05:12:04,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:04,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724180745] [2021-06-05 05:12:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:05,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724180745] [2021-06-05 05:12:05,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724180745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313529406] [2021-06-05 05:12:05,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:05,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:12:05,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313529406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:05,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:12:05,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119149360] [2021-06-05 05:12:05,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:12:05,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:05,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:12:05,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:12:05,179 INFO L87 Difference]: Start difference. First operand 133 states and 369 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:05,231 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2021-06-05 05:12:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:12:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:05,233 INFO L225 Difference]: With dead ends: 205 [2021-06-05 05:12:05,233 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 05:12:05,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:12:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 05:12:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-06-05 05:12:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.837037037037037) internal successors, (383), 135 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2021-06-05 05:12:05,237 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2021-06-05 05:12:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:05,237 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2021-06-05 05:12:05,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2021-06-05 05:12:05,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:05,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:05,238 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:05,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:05,458 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:05,458 INFO L82 PathProgramCache]: Analyzing trace with hash -141666181, now seen corresponding path program 2 times [2021-06-05 05:12:05,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:05,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091781228] [2021-06-05 05:12:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:05,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091781228] [2021-06-05 05:12:05,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091781228] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:05,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:05,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:12:05,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860791867] [2021-06-05 05:12:05,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:12:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:12:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:05,481 INFO L87 Difference]: Start difference. First operand 136 states and 383 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:05,543 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2021-06-05 05:12:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:12:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:05,545 INFO L225 Difference]: With dead ends: 253 [2021-06-05 05:12:05,545 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 05:12:05,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:12:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 05:12:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-06-05 05:12:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.811320754716981) internal successors, (447), 159 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2021-06-05 05:12:05,549 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2021-06-05 05:12:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:05,550 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2021-06-05 05:12:05,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2021-06-05 05:12:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:05,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:05,550 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:05,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 05:12:05,551 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:05,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2044687976, now seen corresponding path program 3 times [2021-06-05 05:12:05,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:05,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518791974] [2021-06-05 05:12:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:05,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518791974] [2021-06-05 05:12:05,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518791974] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:05,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:05,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:12:05,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647258681] [2021-06-05 05:12:05,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:12:05,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:12:05,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:05,571 INFO L87 Difference]: Start difference. First operand 160 states and 447 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:05,626 INFO L93 Difference]: Finished difference Result 211 states and 560 transitions. [2021-06-05 05:12:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:12:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:05,627 INFO L225 Difference]: With dead ends: 211 [2021-06-05 05:12:05,627 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 05:12:05,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:12:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 05:12:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-06-05 05:12:05,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.792452830188679) internal successors, (444), 159 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 444 transitions. [2021-06-05 05:12:05,633 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 444 transitions. Word has length 18 [2021-06-05 05:12:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:05,633 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 444 transitions. [2021-06-05 05:12:05,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 444 transitions. [2021-06-05 05:12:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:05,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:05,634 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:05,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 05:12:05,634 INFO L430 AbstractCegarLoop]: === Iteration 9 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:05,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1877852891, now seen corresponding path program 3 times [2021-06-05 05:12:05,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:05,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688648238] [2021-06-05 05:12:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688648238] [2021-06-05 05:12:05,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688648238] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:05,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:05,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:12:05,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685108136] [2021-06-05 05:12:05,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:12:05,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:05,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:12:05,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:05,678 INFO L87 Difference]: Start difference. First operand 160 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:05,718 INFO L93 Difference]: Finished difference Result 190 states and 515 transitions. [2021-06-05 05:12:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:12:05,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:05,719 INFO L225 Difference]: With dead ends: 190 [2021-06-05 05:12:05,719 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 05:12:05,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:12:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 05:12:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2021-06-05 05:12:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-06-05 05:12:05,723 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-06-05 05:12:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:05,723 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-06-05 05:12:05,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-06-05 05:12:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:05,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:05,723 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:05,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 05:12:05,724 INFO L430 AbstractCegarLoop]: === Iteration 10 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:05,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:05,724 INFO L82 PathProgramCache]: Analyzing trace with hash -663824830, now seen corresponding path program 4 times [2021-06-05 05:12:05,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:05,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708960621] [2021-06-05 05:12:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:05,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708960621] [2021-06-05 05:12:05,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708960621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573250158] [2021-06-05 05:12:05,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:05,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:05,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:12:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573250158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:05,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:12:05,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166931843] [2021-06-05 05:12:05,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:12:05,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:05,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:12:05,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:12:05,844 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:05,889 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2021-06-05 05:12:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:12:05,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:05,894 INFO L225 Difference]: With dead ends: 193 [2021-06-05 05:12:05,894 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 05:12:05,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:12:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 05:12:05,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-06-05 05:12:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-06-05 05:12:05,906 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-06-05 05:12:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:05,906 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-06-05 05:12:05,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-06-05 05:12:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:05,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:05,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:06,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:12:06,121 INFO L430 AbstractCegarLoop]: === Iteration 11 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash 810916037, now seen corresponding path program 4 times [2021-06-05 05:12:06,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:06,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694598731] [2021-06-05 05:12:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:06,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:06,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694598731] [2021-06-05 05:12:06,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694598731] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:06,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:06,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:12:06,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904390507] [2021-06-05 05:12:06,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:12:06,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:06,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:12:06,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:06,141 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:06,186 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2021-06-05 05:12:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:12:06,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:06,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:06,187 INFO L225 Difference]: With dead ends: 197 [2021-06-05 05:12:06,188 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 05:12:06,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:12:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 05:12:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2021-06-05 05:12:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2021-06-05 05:12:06,192 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2021-06-05 05:12:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:06,192 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2021-06-05 05:12:06,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2021-06-05 05:12:06,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:06,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:06,193 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:06,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 05:12:06,193 INFO L430 AbstractCegarLoop]: === Iteration 12 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash -951885686, now seen corresponding path program 5 times [2021-06-05 05:12:06,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:06,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219672640] [2021-06-05 05:12:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:06,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:06,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219672640] [2021-06-05 05:12:06,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219672640] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:06,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:06,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:12:06,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440433067] [2021-06-05 05:12:06,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:12:06,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:06,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:12:06,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:06,211 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:06,290 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2021-06-05 05:12:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:12:06,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:06,294 INFO L225 Difference]: With dead ends: 248 [2021-06-05 05:12:06,294 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 05:12:06,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:12:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 05:12:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2021-06-05 05:12:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.773006134969325) internal successors, (452), 163 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 452 transitions. [2021-06-05 05:12:06,300 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 452 transitions. Word has length 18 [2021-06-05 05:12:06,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:06,301 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 452 transitions. [2021-06-05 05:12:06,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,301 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 452 transitions. [2021-06-05 05:12:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:06,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:06,302 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:06,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 05:12:06,302 INFO L430 AbstractCegarLoop]: === Iteration 13 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:06,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1324312115, now seen corresponding path program 5 times [2021-06-05 05:12:06,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:06,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789567654] [2021-06-05 05:12:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:06,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:06,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789567654] [2021-06-05 05:12:06,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789567654] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:06,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:06,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:12:06,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452259250] [2021-06-05 05:12:06,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:12:06,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:06,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:12:06,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:06,344 INFO L87 Difference]: Start difference. First operand 164 states and 452 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:06,389 INFO L93 Difference]: Finished difference Result 190 states and 503 transitions. [2021-06-05 05:12:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:12:06,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:06,391 INFO L225 Difference]: With dead ends: 190 [2021-06-05 05:12:06,391 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 05:12:06,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:12:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 05:12:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 161. [2021-06-05 05:12:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.775) internal successors, (444), 160 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2021-06-05 05:12:06,395 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2021-06-05 05:12:06,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:06,395 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2021-06-05 05:12:06,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,396 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2021-06-05 05:12:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:06,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:06,397 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:06,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 05:12:06,397 INFO L430 AbstractCegarLoop]: === Iteration 14 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:06,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:06,397 INFO L82 PathProgramCache]: Analyzing trace with hash 11936556, now seen corresponding path program 6 times [2021-06-05 05:12:06,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:06,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507217049] [2021-06-05 05:12:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:06,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:06,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507217049] [2021-06-05 05:12:06,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507217049] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:06,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:06,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:12:06,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643140017] [2021-06-05 05:12:06,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:12:06,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:06,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:12:06,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:06,421 INFO L87 Difference]: Start difference. First operand 161 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:06,464 INFO L93 Difference]: Finished difference Result 164 states and 446 transitions. [2021-06-05 05:12:06,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:12:06,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:06,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:06,465 INFO L225 Difference]: With dead ends: 164 [2021-06-05 05:12:06,465 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 05:12:06,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:12:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 05:12:06,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-06-05 05:12:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.779874213836478) internal successors, (442), 159 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 442 transitions. [2021-06-05 05:12:06,469 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 442 transitions. Word has length 18 [2021-06-05 05:12:06,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:06,469 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 442 transitions. [2021-06-05 05:12:06,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 442 transitions. [2021-06-05 05:12:06,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:12:06,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:06,470 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:06,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 05:12:06,470 INFO L430 AbstractCegarLoop]: === Iteration 15 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash 459545933, now seen corresponding path program 6 times [2021-06-05 05:12:06,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:06,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523898277] [2021-06-05 05:12:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:06,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:06,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523898277] [2021-06-05 05:12:06,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523898277] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:12:06,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:12:06,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:12:06,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148885263] [2021-06-05 05:12:06,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:12:06,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:06,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:12:06,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:12:06,485 INFO L87 Difference]: Start difference. First operand 160 states and 442 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:06,515 INFO L93 Difference]: Finished difference Result 153 states and 422 transitions. [2021-06-05 05:12:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:12:06,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:12:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:06,517 INFO L225 Difference]: With dead ends: 153 [2021-06-05 05:12:06,517 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 05:12:06,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:12:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 05:12:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 135. [2021-06-05 05:12:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-06-05 05:12:06,520 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2021-06-05 05:12:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:06,520 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-06-05 05:12:06,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:06,520 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-06-05 05:12:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:06,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:06,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:06,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 05:12:06,521 INFO L430 AbstractCegarLoop]: === Iteration 16 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:06,521 INFO L82 PathProgramCache]: Analyzing trace with hash 442648773, now seen corresponding path program 1 times [2021-06-05 05:12:06,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:06,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403388538] [2021-06-05 05:12:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:06,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:06,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403388538] [2021-06-05 05:12:06,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403388538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:06,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388581889] [2021-06-05 05:12:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:06,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:12:06,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:06,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:06,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:06,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-06-05 05:12:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:06,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388581889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:06,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:06,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 05:12:06,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573736645] [2021-06-05 05:12:06,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:06,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:06,826 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:07,175 INFO L93 Difference]: Finished difference Result 382 states and 1086 transitions. [2021-06-05 05:12:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:12:07,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:07,178 INFO L225 Difference]: With dead ends: 382 [2021-06-05 05:12:07,178 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 05:12:07,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 05:12:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 186. [2021-06-05 05:12:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8162162162162163) internal successors, (521), 185 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2021-06-05 05:12:07,184 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2021-06-05 05:12:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:07,185 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2021-06-05 05:12:07,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2021-06-05 05:12:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:07,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:07,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:07,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:07,403 INFO L430 AbstractCegarLoop]: === Iteration 17 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:07,403 INFO L82 PathProgramCache]: Analyzing trace with hash 600946541, now seen corresponding path program 2 times [2021-06-05 05:12:07,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:07,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6233973] [2021-06-05 05:12:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:07,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:07,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6233973] [2021-06-05 05:12:07,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6233973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:07,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217900592] [2021-06-05 05:12:07,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:07,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:07,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:07,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:07,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:07,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:07,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:07,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:07,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:07,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:07,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 05:12:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:07,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217900592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:07,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:07,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:12:07,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039695814] [2021-06-05 05:12:07,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:07,766 INFO L87 Difference]: Start difference. First operand 186 states and 521 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:08,565 INFO L93 Difference]: Finished difference Result 399 states and 1155 transitions. [2021-06-05 05:12:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:12:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:08,567 INFO L225 Difference]: With dead ends: 399 [2021-06-05 05:12:08,567 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 05:12:08,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 585.1ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:12:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 05:12:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 189. [2021-06-05 05:12:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8191489361702127) internal successors, (530), 188 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 530 transitions. [2021-06-05 05:12:08,573 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 530 transitions. Word has length 20 [2021-06-05 05:12:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:08,573 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 530 transitions. [2021-06-05 05:12:08,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 530 transitions. [2021-06-05 05:12:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:08,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:08,574 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:08,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:12:08,781 INFO L430 AbstractCegarLoop]: === Iteration 18 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash 424405109, now seen corresponding path program 3 times [2021-06-05 05:12:08,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:08,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361394275] [2021-06-05 05:12:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:08,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:08,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361394275] [2021-06-05 05:12:08,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361394275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:08,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840354647] [2021-06-05 05:12:08,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:08,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:12:08,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:08,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:08,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:08,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:08,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:08,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:08,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:08,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:09,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840354647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:09,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:09,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:12:09,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770516519] [2021-06-05 05:12:09,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:09,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:09,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:09,113 INFO L87 Difference]: Start difference. First operand 189 states and 530 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:09,794 INFO L93 Difference]: Finished difference Result 363 states and 1048 transitions. [2021-06-05 05:12:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:12:09,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:09,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:09,797 INFO L225 Difference]: With dead ends: 363 [2021-06-05 05:12:09,797 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 05:12:09,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 05:12:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 192. [2021-06-05 05:12:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8219895287958114) internal successors, (539), 191 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 539 transitions. [2021-06-05 05:12:09,803 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 539 transitions. Word has length 20 [2021-06-05 05:12:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:09,803 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 539 transitions. [2021-06-05 05:12:09,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 539 transitions. [2021-06-05 05:12:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:09,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:09,803 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:10,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:10,022 INFO L430 AbstractCegarLoop]: === Iteration 19 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:10,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:10,022 INFO L82 PathProgramCache]: Analyzing trace with hash -409333331, now seen corresponding path program 4 times [2021-06-05 05:12:10,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:10,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467392028] [2021-06-05 05:12:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:10,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:10,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467392028] [2021-06-05 05:12:10,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467392028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:10,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939904887] [2021-06-05 05:12:10,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:10,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:10,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:10,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:10,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:10,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:10,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:10,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:10,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:10,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939904887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:10,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:10,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:10,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988975372] [2021-06-05 05:12:10,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:10,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:10,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:10,293 INFO L87 Difference]: Start difference. First operand 192 states and 539 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:10,693 INFO L93 Difference]: Finished difference Result 310 states and 882 transitions. [2021-06-05 05:12:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:12:10,693 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:10,695 INFO L225 Difference]: With dead ends: 310 [2021-06-05 05:12:10,695 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 05:12:10,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 05:12:10,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2021-06-05 05:12:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.875598086124402) internal successors, (601), 209 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 601 transitions. [2021-06-05 05:12:10,699 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 601 transitions. Word has length 20 [2021-06-05 05:12:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:10,699 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 601 transitions. [2021-06-05 05:12:10,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 601 transitions. [2021-06-05 05:12:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:10,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:10,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:10,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:10,915 INFO L430 AbstractCegarLoop]: === Iteration 20 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:10,916 INFO L82 PathProgramCache]: Analyzing trace with hash -908838833, now seen corresponding path program 1 times [2021-06-05 05:12:10,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:10,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742412807] [2021-06-05 05:12:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:10,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:10,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742412807] [2021-06-05 05:12:10,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742412807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:10,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217757713] [2021-06-05 05:12:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:11,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:11,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:12:11,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:11,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:11,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:11,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-06-05 05:12:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:11,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217757713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:11,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:11,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 05:12:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524628036] [2021-06-05 05:12:11,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:11,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:11,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:11,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:11,109 INFO L87 Difference]: Start difference. First operand 210 states and 601 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:11,419 INFO L93 Difference]: Finished difference Result 423 states and 1216 transitions. [2021-06-05 05:12:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:12:11,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:11,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:11,421 INFO L225 Difference]: With dead ends: 423 [2021-06-05 05:12:11,421 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 05:12:11,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 05:12:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 216. [2021-06-05 05:12:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.8883720930232557) internal successors, (621), 215 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 621 transitions. [2021-06-05 05:12:11,426 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 621 transitions. Word has length 20 [2021-06-05 05:12:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:11,426 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 621 transitions. [2021-06-05 05:12:11,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 621 transitions. [2021-06-05 05:12:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:11,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:11,427 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:11,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:12:11,641 INFO L430 AbstractCegarLoop]: === Iteration 21 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1199871497, now seen corresponding path program 2 times [2021-06-05 05:12:11,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:11,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920989790] [2021-06-05 05:12:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:11,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:11,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920989790] [2021-06-05 05:12:11,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920989790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:11,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393758044] [2021-06-05 05:12:11,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:11,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:11,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:11,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:11,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:12:11,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:11,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:11,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:11,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:12:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:11,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393758044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:11,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:11,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:11,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857519519] [2021-06-05 05:12:11,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:11,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:11,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:11,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:11,914 INFO L87 Difference]: Start difference. First operand 216 states and 621 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:12,170 INFO L93 Difference]: Finished difference Result 332 states and 961 transitions. [2021-06-05 05:12:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:12:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:12,172 INFO L225 Difference]: With dead ends: 332 [2021-06-05 05:12:12,172 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 05:12:12,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 05:12:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 219. [2021-06-05 05:12:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.8944954128440368) internal successors, (631), 218 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 631 transitions. [2021-06-05 05:12:12,176 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 631 transitions. Word has length 20 [2021-06-05 05:12:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:12,176 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 631 transitions. [2021-06-05 05:12:12,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 631 transitions. [2021-06-05 05:12:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:12,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:12,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:12,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:12,393 INFO L430 AbstractCegarLoop]: === Iteration 22 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:12,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:12,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2066945939, now seen corresponding path program 3 times [2021-06-05 05:12:12,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:12,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276967910] [2021-06-05 05:12:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:12,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:12,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276967910] [2021-06-05 05:12:12,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276967910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:12,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692247767] [2021-06-05 05:12:12,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:12,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:12:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:12,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:12,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:12,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:12,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:12,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:12,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 05:12:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:12,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692247767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:12,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:12,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:12:12,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410347665] [2021-06-05 05:12:12,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:12,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:12,656 INFO L87 Difference]: Start difference. First operand 219 states and 631 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:13,137 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-06-05 05:12:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:12:13,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:13,139 INFO L225 Difference]: With dead ends: 343 [2021-06-05 05:12:13,139 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 05:12:13,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 05:12:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 222. [2021-06-05 05:12:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9004524886877827) internal successors, (641), 221 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 641 transitions. [2021-06-05 05:12:13,144 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 641 transitions. Word has length 20 [2021-06-05 05:12:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:13,144 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 641 transitions. [2021-06-05 05:12:13,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 641 transitions. [2021-06-05 05:12:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:13,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:13,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:13,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:13,365 INFO L430 AbstractCegarLoop]: === Iteration 23 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:13,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1904435179, now seen corresponding path program 4 times [2021-06-05 05:12:13,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:13,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236535511] [2021-06-05 05:12:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:13,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236535511] [2021-06-05 05:12:13,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236535511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253173865] [2021-06-05 05:12:13,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:13,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:13,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:13,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:13,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:13,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:13,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:13,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:13,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:13,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:13,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253173865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:13,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:13,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:13,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017861068] [2021-06-05 05:12:13,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:13,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:13,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:13,548 INFO L87 Difference]: Start difference. First operand 222 states and 641 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:13,761 INFO L93 Difference]: Finished difference Result 318 states and 927 transitions. [2021-06-05 05:12:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:12:13,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:13,763 INFO L225 Difference]: With dead ends: 318 [2021-06-05 05:12:13,763 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 05:12:13,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 05:12:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 224. [2021-06-05 05:12:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.905829596412556) internal successors, (648), 223 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-06-05 05:12:13,767 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-06-05 05:12:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:13,768 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-06-05 05:12:13,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-06-05 05:12:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:13,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:13,768 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:13,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:12:13,969 INFO L430 AbstractCegarLoop]: === Iteration 24 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:13,969 INFO L82 PathProgramCache]: Analyzing trace with hash -453703043, now seen corresponding path program 5 times [2021-06-05 05:12:13,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:13,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175652928] [2021-06-05 05:12:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:14,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:14,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175652928] [2021-06-05 05:12:14,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175652928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:14,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70553701] [2021-06-05 05:12:14,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:14,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:14,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:14,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:14,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:12:14,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:14,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:14,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:14,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:12:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:14,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70553701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:14,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:14,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:14,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179728323] [2021-06-05 05:12:14,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:14,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:14,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:14,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:14,196 INFO L87 Difference]: Start difference. First operand 224 states and 648 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:14,428 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-06-05 05:12:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:14,430 INFO L225 Difference]: With dead ends: 328 [2021-06-05 05:12:14,430 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 05:12:14,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 05:12:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 224. [2021-06-05 05:12:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.905829596412556) internal successors, (648), 223 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-06-05 05:12:14,434 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-06-05 05:12:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:14,434 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-06-05 05:12:14,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-06-05 05:12:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:14,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:14,435 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:14,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:14,645 INFO L430 AbstractCegarLoop]: === Iteration 25 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash -236278157, now seen corresponding path program 6 times [2021-06-05 05:12:14,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:14,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868910353] [2021-06-05 05:12:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:14,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868910353] [2021-06-05 05:12:14,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868910353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41780949] [2021-06-05 05:12:14,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:14,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:14,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:14,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:14,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:14,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:14,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:14,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:14,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:14,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:14,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41780949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:14,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:14,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:12:14,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638942597] [2021-06-05 05:12:14,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:12:14,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:14,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:12:14,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:14,957 INFO L87 Difference]: Start difference. First operand 224 states and 648 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:15,644 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-06-05 05:12:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:12:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:15,646 INFO L225 Difference]: With dead ends: 462 [2021-06-05 05:12:15,646 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 05:12:15,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 598.6ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 05:12:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 235. [2021-06-05 05:12:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.965811965811966) internal successors, (694), 234 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-06-05 05:12:15,652 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-06-05 05:12:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:15,652 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-06-05 05:12:15,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-06-05 05:12:15,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:15,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:15,653 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:15,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:12:15,854 INFO L430 AbstractCegarLoop]: === Iteration 26 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:15,854 INFO L82 PathProgramCache]: Analyzing trace with hash 188465799, now seen corresponding path program 5 times [2021-06-05 05:12:15,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:15,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432419638] [2021-06-05 05:12:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:15,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:15,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432419638] [2021-06-05 05:12:15,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432419638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:15,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534866441] [2021-06-05 05:12:15,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:15,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:15,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:15,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:15,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:16,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:16,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:12:16,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:16,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:16,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:16,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:12:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:16,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534866441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:16,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:16,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:16,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256111296] [2021-06-05 05:12:16,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:16,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:16,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:16,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:16,090 INFO L87 Difference]: Start difference. First operand 235 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:16,248 INFO L93 Difference]: Finished difference Result 327 states and 955 transitions. [2021-06-05 05:12:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:16,250 INFO L225 Difference]: With dead ends: 327 [2021-06-05 05:12:16,250 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 05:12:16,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 05:12:16,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 238. [2021-06-05 05:12:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.970464135021097) internal successors, (704), 237 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 704 transitions. [2021-06-05 05:12:16,255 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 704 transitions. Word has length 20 [2021-06-05 05:12:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:16,255 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 704 transitions. [2021-06-05 05:12:16,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 704 transitions. [2021-06-05 05:12:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:16,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:16,255 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:16,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:16,474 INFO L430 AbstractCegarLoop]: === Iteration 27 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:16,474 INFO L82 PathProgramCache]: Analyzing trace with hash -839684061, now seen corresponding path program 6 times [2021-06-05 05:12:16,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:16,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564507094] [2021-06-05 05:12:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:16,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:16,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564507094] [2021-06-05 05:12:16,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564507094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:16,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930950773] [2021-06-05 05:12:16,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:16,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:16,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:16,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:16,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:16,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:16,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:16,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:16,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 05:12:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:16,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930950773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:16,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:16,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:12:16,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548503400] [2021-06-05 05:12:16,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:16,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:16,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:16,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:16,726 INFO L87 Difference]: Start difference. First operand 238 states and 704 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:17,139 INFO L93 Difference]: Finished difference Result 341 states and 1001 transitions. [2021-06-05 05:12:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:12:17,140 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:17,141 INFO L225 Difference]: With dead ends: 341 [2021-06-05 05:12:17,141 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 05:12:17,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 05:12:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 241. [2021-06-05 05:12:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.975) internal successors, (714), 240 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 714 transitions. [2021-06-05 05:12:17,146 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 714 transitions. Word has length 20 [2021-06-05 05:12:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:17,146 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 714 transitions. [2021-06-05 05:12:17,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 714 transitions. [2021-06-05 05:12:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:17,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:17,147 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:17,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 05:12:17,362 INFO L430 AbstractCegarLoop]: === Iteration 28 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:17,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:17,363 INFO L82 PathProgramCache]: Analyzing trace with hash -516097883, now seen corresponding path program 7 times [2021-06-05 05:12:17,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:17,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844785971] [2021-06-05 05:12:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:17,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:17,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844785971] [2021-06-05 05:12:17,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844785971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:17,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247102835] [2021-06-05 05:12:17,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:17,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:17,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:17,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:17,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:17,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:17,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:17,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:17,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247102835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:17,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:17,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:17,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214080801] [2021-06-05 05:12:17,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:17,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:17,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:17,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:17,572 INFO L87 Difference]: Start difference. First operand 241 states and 714 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:17,702 INFO L93 Difference]: Finished difference Result 310 states and 911 transitions. [2021-06-05 05:12:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:17,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:17,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:17,704 INFO L225 Difference]: With dead ends: 310 [2021-06-05 05:12:17,704 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 05:12:17,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 05:12:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 235. [2021-06-05 05:12:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.965811965811966) internal successors, (694), 234 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-06-05 05:12:17,708 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-06-05 05:12:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:17,708 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-06-05 05:12:17,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-06-05 05:12:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:17,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:17,709 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:17,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:12:17,925 INFO L430 AbstractCegarLoop]: === Iteration 29 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:17,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1628624025, now seen corresponding path program 7 times [2021-06-05 05:12:17,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:17,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587000324] [2021-06-05 05:12:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:18,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587000324] [2021-06-05 05:12:18,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587000324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053444967] [2021-06-05 05:12:18,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:18,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:18,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:18,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:18,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:18,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:18,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053444967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:18,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:18,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:18,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091913428] [2021-06-05 05:12:18,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:18,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:18,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:18,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:18,133 INFO L87 Difference]: Start difference. First operand 235 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:18,318 INFO L93 Difference]: Finished difference Result 350 states and 1025 transitions. [2021-06-05 05:12:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:12:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:18,320 INFO L225 Difference]: With dead ends: 350 [2021-06-05 05:12:18,320 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 05:12:18,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 05:12:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 246. [2021-06-05 05:12:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-06-05 05:12:18,324 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 20 [2021-06-05 05:12:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:18,324 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-06-05 05:12:18,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-06-05 05:12:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:18,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:18,325 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:18,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:12:18,537 INFO L430 AbstractCegarLoop]: === Iteration 30 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash -162237149, now seen corresponding path program 8 times [2021-06-05 05:12:18,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:18,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349795909] [2021-06-05 05:12:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:18,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:18,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349795909] [2021-06-05 05:12:18,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349795909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:18,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020854782] [2021-06-05 05:12:18,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:18,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:18,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:18,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:18,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:18,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:18,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:18,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:18,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020854782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:18,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:18,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:18,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182244161] [2021-06-05 05:12:18,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:18,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:18,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:18,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:18,759 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:18,961 INFO L93 Difference]: Finished difference Result 351 states and 1041 transitions. [2021-06-05 05:12:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:12:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:18,962 INFO L225 Difference]: With dead ends: 351 [2021-06-05 05:12:18,962 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 05:12:18,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 05:12:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 256. [2021-06-05 05:12:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.062745098039216) internal successors, (781), 255 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-06-05 05:12:18,967 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-06-05 05:12:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:18,967 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-06-05 05:12:18,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-06-05 05:12:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:18,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:18,967 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:19,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 05:12:19,173 INFO L430 AbstractCegarLoop]: === Iteration 31 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash -428870833, now seen corresponding path program 8 times [2021-06-05 05:12:19,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:19,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423508582] [2021-06-05 05:12:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:19,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:19,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423508582] [2021-06-05 05:12:19,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423508582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:19,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136935376] [2021-06-05 05:12:19,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:19,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:19,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:19,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:19,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:19,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:19,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:19,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:19,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:19,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:19,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136935376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:19,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:19,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:19,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228591126] [2021-06-05 05:12:19,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:19,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:19,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:19,348 INFO L87 Difference]: Start difference. First operand 256 states and 781 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:19,499 INFO L93 Difference]: Finished difference Result 333 states and 1000 transitions. [2021-06-05 05:12:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:19,500 INFO L225 Difference]: With dead ends: 333 [2021-06-05 05:12:19,500 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 05:12:19,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 05:12:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 259. [2021-06-05 05:12:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.065891472868217) internal successors, (791), 258 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 791 transitions. [2021-06-05 05:12:19,505 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 791 transitions. Word has length 20 [2021-06-05 05:12:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:19,505 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 791 transitions. [2021-06-05 05:12:19,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 791 transitions. [2021-06-05 05:12:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:19,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:19,505 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:19,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:19,717 INFO L430 AbstractCegarLoop]: === Iteration 32 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash -105284655, now seen corresponding path program 9 times [2021-06-05 05:12:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:19,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525800997] [2021-06-05 05:12:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:19,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:19,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525800997] [2021-06-05 05:12:19,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525800997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:19,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352759515] [2021-06-05 05:12:19,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:19,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:19,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:19,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:19,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:19,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:19,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:19,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:19,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:19,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:19,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:19,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352759515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:19,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:19,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:12:19,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290068775] [2021-06-05 05:12:19,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:19,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:19,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:20,000 INFO L87 Difference]: Start difference. First operand 259 states and 791 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:20,619 INFO L93 Difference]: Finished difference Result 353 states and 1060 transitions. [2021-06-05 05:12:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:12:20,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:20,620 INFO L225 Difference]: With dead ends: 353 [2021-06-05 05:12:20,620 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 05:12:20,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:12:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 05:12:20,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 256. [2021-06-05 05:12:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.062745098039216) internal successors, (781), 255 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-06-05 05:12:20,625 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-06-05 05:12:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:20,625 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-06-05 05:12:20,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-06-05 05:12:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:20,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:20,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:20,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 05:12:20,849 INFO L430 AbstractCegarLoop]: === Iteration 33 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:20,849 INFO L82 PathProgramCache]: Analyzing trace with hash 431638013, now seen corresponding path program 9 times [2021-06-05 05:12:20,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:20,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145327027] [2021-06-05 05:12:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:20,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:20,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145327027] [2021-06-05 05:12:20,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145327027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:20,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087376124] [2021-06-05 05:12:20,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:20,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:20,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:20,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:20,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:21,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:21,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:21,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:21,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:21,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:21,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-06-05 05:12:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:21,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087376124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:21,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:21,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:12:21,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132677526] [2021-06-05 05:12:21,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:21,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:21,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:21,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:21,104 INFO L87 Difference]: Start difference. First operand 256 states and 781 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:21,889 INFO L93 Difference]: Finished difference Result 485 states and 1380 transitions. [2021-06-05 05:12:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:12:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:21,891 INFO L225 Difference]: With dead ends: 485 [2021-06-05 05:12:21,891 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 05:12:21,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 05:12:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 293. [2021-06-05 05:12:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.095890410958904) internal successors, (904), 292 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 904 transitions. [2021-06-05 05:12:21,897 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 904 transitions. Word has length 20 [2021-06-05 05:12:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:21,897 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 904 transitions. [2021-06-05 05:12:21,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 904 transitions. [2021-06-05 05:12:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:21,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:21,898 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:22,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 05:12:22,117 INFO L430 AbstractCegarLoop]: === Iteration 34 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash 226719879, now seen corresponding path program 10 times [2021-06-05 05:12:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:22,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195996665] [2021-06-05 05:12:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:22,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:22,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195996665] [2021-06-05 05:12:22,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195996665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90502302] [2021-06-05 05:12:22,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:22,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:22,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:22,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:22,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:22,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:22,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:12:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:22,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90502302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:22,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:22,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897305535] [2021-06-05 05:12:22,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:22,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:22,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:22,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:22,313 INFO L87 Difference]: Start difference. First operand 293 states and 904 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:22,446 INFO L93 Difference]: Finished difference Result 371 states and 1128 transitions. [2021-06-05 05:12:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:22,448 INFO L225 Difference]: With dead ends: 371 [2021-06-05 05:12:22,448 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 05:12:22,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 05:12:22,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 295. [2021-06-05 05:12:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0884353741496597) internal successors, (908), 294 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 908 transitions. [2021-06-05 05:12:22,453 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 908 transitions. Word has length 20 [2021-06-05 05:12:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:22,453 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 908 transitions. [2021-06-05 05:12:22,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 908 transitions. [2021-06-05 05:12:22,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:22,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:22,453 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:22,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:22,670 INFO L430 AbstractCegarLoop]: === Iteration 35 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2027400643, now seen corresponding path program 10 times [2021-06-05 05:12:22,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:22,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560629964] [2021-06-05 05:12:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:22,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:22,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560629964] [2021-06-05 05:12:22,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560629964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110327088] [2021-06-05 05:12:22,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:22,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:22,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:22,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:22,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:22,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:22,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:22,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:12:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:22,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110327088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:22,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:22,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514973919] [2021-06-05 05:12:22,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:22,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:22,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:22,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:22,886 INFO L87 Difference]: Start difference. First operand 295 states and 908 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:23,083 INFO L93 Difference]: Finished difference Result 412 states and 1240 transitions. [2021-06-05 05:12:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:23,085 INFO L225 Difference]: With dead ends: 412 [2021-06-05 05:12:23,085 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 05:12:23,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 05:12:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 298. [2021-06-05 05:12:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0875420875420874) internal successors, (917), 297 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-06-05 05:12:23,090 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-06-05 05:12:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:23,090 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-06-05 05:12:23,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-06-05 05:12:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:23,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:23,091 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:23,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 05:12:23,301 INFO L430 AbstractCegarLoop]: === Iteration 36 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1645911141, now seen corresponding path program 11 times [2021-06-05 05:12:23,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:23,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476511915] [2021-06-05 05:12:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:23,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:23,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476511915] [2021-06-05 05:12:23,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476511915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:23,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423044516] [2021-06-05 05:12:23,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:23,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:23,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:23,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:23,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:23,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:23,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:23,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:23,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:10 [2021-06-05 05:12:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:23,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423044516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:23,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:23,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 05:12:23,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073789383] [2021-06-05 05:12:23,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:23,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:23,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:23,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:23,534 INFO L87 Difference]: Start difference. First operand 298 states and 917 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:23,911 INFO L93 Difference]: Finished difference Result 460 states and 1382 transitions. [2021-06-05 05:12:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:12:23,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:23,913 INFO L225 Difference]: With dead ends: 460 [2021-06-05 05:12:23,913 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 05:12:23,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:12:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 05:12:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 298. [2021-06-05 05:12:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0875420875420874) internal successors, (917), 297 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-06-05 05:12:23,918 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-06-05 05:12:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:23,918 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-06-05 05:12:23,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-06-05 05:12:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:23,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:23,919 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:24,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:24,135 INFO L430 AbstractCegarLoop]: === Iteration 37 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1815317715, now seen corresponding path program 12 times [2021-06-05 05:12:24,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:24,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690080659] [2021-06-05 05:12:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:12:24,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:24,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690080659] [2021-06-05 05:12:24,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690080659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:24,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646999023] [2021-06-05 05:12:24,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:24,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:24,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:24,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:24,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:24,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:24,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:24,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:24,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:24,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:24,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:24,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646999023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:24,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:24,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:12:24,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758696020] [2021-06-05 05:12:24,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:24,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:24,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:24,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:24,375 INFO L87 Difference]: Start difference. First operand 298 states and 917 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:25,018 INFO L93 Difference]: Finished difference Result 552 states and 1617 transitions. [2021-06-05 05:12:25,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:12:25,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:25,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:25,020 INFO L225 Difference]: With dead ends: 552 [2021-06-05 05:12:25,020 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 05:12:25,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 05:12:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 306. [2021-06-05 05:12:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-05 05:12:25,025 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-05 05:12:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:25,025 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-05 05:12:25,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-05 05:12:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:25,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:25,026 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:25,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 05:12:25,242 INFO L430 AbstractCegarLoop]: === Iteration 38 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1895521031, now seen corresponding path program 11 times [2021-06-05 05:12:25,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:25,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029736109] [2021-06-05 05:12:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:25,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029736109] [2021-06-05 05:12:25,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029736109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873084695] [2021-06-05 05:12:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:25,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:25,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:25,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:25,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:25,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:25,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:25,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:25,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:25,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:25,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 05:12:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:25,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873084695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:25,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:25,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:25,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080106097] [2021-06-05 05:12:25,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:25,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:25,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:25,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:25,423 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:25,627 INFO L93 Difference]: Finished difference Result 408 states and 1237 transitions. [2021-06-05 05:12:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:25,629 INFO L225 Difference]: With dead ends: 408 [2021-06-05 05:12:25,629 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 05:12:25,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 05:12:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 309. [2021-06-05 05:12:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1201298701298703) internal successors, (961), 308 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 961 transitions. [2021-06-05 05:12:25,634 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 961 transitions. Word has length 20 [2021-06-05 05:12:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:25,634 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 961 transitions. [2021-06-05 05:12:25,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 961 transitions. [2021-06-05 05:12:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:25,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:25,634 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:25,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 05:12:25,850 INFO L430 AbstractCegarLoop]: === Iteration 39 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1371296405, now seen corresponding path program 12 times [2021-06-05 05:12:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:25,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853581003] [2021-06-05 05:12:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:25,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:25,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853581003] [2021-06-05 05:12:25,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853581003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:25,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093321787] [2021-06-05 05:12:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:25,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:25,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:25,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:25,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:25,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:25,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:25,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:25,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:25,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:25,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 05:12:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:26,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093321787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:26,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 05:12:26,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312772336] [2021-06-05 05:12:26,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:12:26,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:26,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:12:26,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:26,058 INFO L87 Difference]: Start difference. First operand 309 states and 961 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:26,405 INFO L93 Difference]: Finished difference Result 429 states and 1298 transitions. [2021-06-05 05:12:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:12:26,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:26,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:26,413 INFO L225 Difference]: With dead ends: 429 [2021-06-05 05:12:26,413 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 05:12:26,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 05:12:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 312. [2021-06-05 05:12:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.122186495176849) internal successors, (971), 311 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 971 transitions. [2021-06-05 05:12:26,417 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 971 transitions. Word has length 20 [2021-06-05 05:12:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:26,417 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 971 transitions. [2021-06-05 05:12:26,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 971 transitions. [2021-06-05 05:12:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:26,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:26,418 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:26,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:12:26,633 INFO L430 AbstractCegarLoop]: === Iteration 40 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1694882583, now seen corresponding path program 13 times [2021-06-05 05:12:26,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:26,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883275854] [2021-06-05 05:12:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:26,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:26,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883275854] [2021-06-05 05:12:26,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883275854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483456396] [2021-06-05 05:12:26,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:26,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:26,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:26,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:26,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:26,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:26,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:26,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483456396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:26,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:26,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388111511] [2021-06-05 05:12:26,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:26,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:26,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:26,790 INFO L87 Difference]: Start difference. First operand 312 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:26,948 INFO L93 Difference]: Finished difference Result 391 states and 1193 transitions. [2021-06-05 05:12:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:26,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:26,950 INFO L225 Difference]: With dead ends: 391 [2021-06-05 05:12:26,950 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 05:12:26,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 05:12:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 306. [2021-06-05 05:12:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-05 05:12:26,954 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-05 05:12:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:26,954 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-05 05:12:26,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-05 05:12:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:26,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:26,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:27,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 05:12:27,156 INFO L430 AbstractCegarLoop]: === Iteration 41 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:27,156 INFO L82 PathProgramCache]: Analyzing trace with hash -455362805, now seen corresponding path program 13 times [2021-06-05 05:12:27,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:27,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962576045] [2021-06-05 05:12:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:27,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:27,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962576045] [2021-06-05 05:12:27,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962576045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:27,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207636777] [2021-06-05 05:12:27,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:27,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:27,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:27,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:27,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:27,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:27,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:27,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:27,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:27,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207636777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:27,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:27,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:27,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137203653] [2021-06-05 05:12:27,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:27,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:27,347 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:27,549 INFO L93 Difference]: Finished difference Result 431 states and 1307 transitions. [2021-06-05 05:12:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:12:27,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:27,551 INFO L225 Difference]: With dead ends: 431 [2021-06-05 05:12:27,551 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 05:12:27,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 05:12:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-06-05 05:12:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-05 05:12:27,555 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-05 05:12:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:27,555 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-05 05:12:27,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-05 05:12:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:27,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:27,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:27,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 05:12:27,769 INFO L430 AbstractCegarLoop]: === Iteration 42 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2048743317, now seen corresponding path program 14 times [2021-06-05 05:12:27,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:27,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382361218] [2021-06-05 05:12:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:27,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:27,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382361218] [2021-06-05 05:12:27,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382361218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:27,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318981487] [2021-06-05 05:12:27,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:27,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:27,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:27,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:27,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:27,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:27,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:27,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:27,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:27,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:27,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318981487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:27,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:27,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:27,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827201518] [2021-06-05 05:12:27,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:27,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:27,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:27,973 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:28,194 INFO L93 Difference]: Finished difference Result 424 states and 1287 transitions. [2021-06-05 05:12:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:12:28,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:28,196 INFO L225 Difference]: With dead ends: 424 [2021-06-05 05:12:28,196 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 05:12:28,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 05:12:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-06-05 05:12:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-05 05:12:28,200 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-05 05:12:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:28,200 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-05 05:12:28,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-05 05:12:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:28,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:28,201 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:28,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:28,402 INFO L430 AbstractCegarLoop]: === Iteration 43 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:28,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1782109633, now seen corresponding path program 14 times [2021-06-05 05:12:28,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:28,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612143024] [2021-06-05 05:12:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:28,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:28,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612143024] [2021-06-05 05:12:28,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612143024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:28,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166489944] [2021-06-05 05:12:28,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:28,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:28,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:28,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:28,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:28,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:28,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:28,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:28,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:28,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:28,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166489944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:28,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:28,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:28,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714099114] [2021-06-05 05:12:28,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:28,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:28,589 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:28,763 INFO L93 Difference]: Finished difference Result 398 states and 1210 transitions. [2021-06-05 05:12:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:28,765 INFO L225 Difference]: With dead ends: 398 [2021-06-05 05:12:28,765 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 05:12:28,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:28,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 05:12:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 312. [2021-06-05 05:12:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.1157556270096465) internal successors, (969), 311 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 969 transitions. [2021-06-05 05:12:28,769 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 969 transitions. Word has length 20 [2021-06-05 05:12:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:28,769 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 969 transitions. [2021-06-05 05:12:28,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 969 transitions. [2021-06-05 05:12:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:28,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:28,770 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:28,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:28,981 INFO L430 AbstractCegarLoop]: === Iteration 44 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2105695811, now seen corresponding path program 15 times [2021-06-05 05:12:28,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:28,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109983172] [2021-06-05 05:12:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:29,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:29,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109983172] [2021-06-05 05:12:29,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109983172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:29,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355189869] [2021-06-05 05:12:29,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:29,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:29,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:29,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:29,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:29,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:29,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:29,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:29,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:29,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 05:12:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355189869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:29,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:29,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:12:29,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047420678] [2021-06-05 05:12:29,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:29,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:29,240 INFO L87 Difference]: Start difference. First operand 312 states and 969 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:29,964 INFO L93 Difference]: Finished difference Result 464 states and 1400 transitions. [2021-06-05 05:12:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:29,966 INFO L225 Difference]: With dead ends: 464 [2021-06-05 05:12:29,966 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 05:12:29,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 05:12:29,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 309. [2021-06-05 05:12:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-05 05:12:29,971 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-05 05:12:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:29,971 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-05 05:12:29,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-05 05:12:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:29,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:29,972 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:30,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 05:12:30,180 INFO L430 AbstractCegarLoop]: === Iteration 45 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:30,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1652348817, now seen corresponding path program 15 times [2021-06-05 05:12:30,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:30,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616263128] [2021-06-05 05:12:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:30,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:30,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616263128] [2021-06-05 05:12:30,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616263128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:30,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144729076] [2021-06-05 05:12:30,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:30,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:30,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:30,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:30,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:30,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:30,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:30,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:30,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:30,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-06-05 05:12:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:30,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144729076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:30,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:30,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:12:30,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164035608] [2021-06-05 05:12:30,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:30,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:30,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:30,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:30,471 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:31,443 INFO L93 Difference]: Finished difference Result 598 states and 1728 transitions. [2021-06-05 05:12:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:12:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:31,446 INFO L225 Difference]: With dead ends: 598 [2021-06-05 05:12:31,446 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 05:12:31,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 721.6ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:12:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 05:12:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 313. [2021-06-05 05:12:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.1121794871794872) internal successors, (971), 312 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 971 transitions. [2021-06-05 05:12:31,451 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 971 transitions. Word has length 20 [2021-06-05 05:12:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:31,451 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 971 transitions. [2021-06-05 05:12:31,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 971 transitions. [2021-06-05 05:12:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:31,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:31,452 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:31,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:31,665 INFO L430 AbstractCegarLoop]: === Iteration 46 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1857266951, now seen corresponding path program 16 times [2021-06-05 05:12:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:31,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824857591] [2021-06-05 05:12:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:31,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:31,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824857591] [2021-06-05 05:12:31,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824857591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:31,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424482804] [2021-06-05 05:12:31,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:31,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:31,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:31,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:31,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:31,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:31,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:12:31,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:31,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:31,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:31,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:12:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:31,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424482804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:31,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:31,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:31,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998297214] [2021-06-05 05:12:31,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:31,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:31,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:31,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:31,845 INFO L87 Difference]: Start difference. First operand 313 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:32,036 INFO L93 Difference]: Finished difference Result 403 states and 1227 transitions. [2021-06-05 05:12:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:32,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:32,037 INFO L225 Difference]: With dead ends: 403 [2021-06-05 05:12:32,037 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 05:12:32,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 05:12:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 306. [2021-06-05 05:12:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-05 05:12:32,041 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-05 05:12:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:32,041 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-05 05:12:32,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-05 05:12:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:32,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:32,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:32,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:32,258 INFO L430 AbstractCegarLoop]: === Iteration 47 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:32,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:32,258 INFO L82 PathProgramCache]: Analyzing trace with hash -76255857, now seen corresponding path program 16 times [2021-06-05 05:12:32,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:32,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464716712] [2021-06-05 05:12:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:32,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:32,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464716712] [2021-06-05 05:12:32,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464716712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:32,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824585000] [2021-06-05 05:12:32,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:32,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:32,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:32,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:32,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:32,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:32,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:32,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:32,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:32,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:32,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:32,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824585000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:32,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:32,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:32,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395428884] [2021-06-05 05:12:32,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:32,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:32,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:32,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:32,472 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:32,707 INFO L93 Difference]: Finished difference Result 448 states and 1357 transitions. [2021-06-05 05:12:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:32,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:32,709 INFO L225 Difference]: With dead ends: 448 [2021-06-05 05:12:32,709 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 05:12:32,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 05:12:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 312. [2021-06-05 05:12:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-05 05:12:32,714 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-05 05:12:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:32,714 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-05 05:12:32,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-05 05:12:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:32,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:32,715 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:32,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:32,915 INFO L430 AbstractCegarLoop]: === Iteration 48 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1438435337, now seen corresponding path program 17 times [2021-06-05 05:12:32,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:32,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855571891] [2021-06-05 05:12:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:32,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:32,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855571891] [2021-06-05 05:12:32,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855571891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:32,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723873791] [2021-06-05 05:12:32,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:33,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:33,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:33,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:33,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:33,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:33,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:33,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:33,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:33,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:33,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723873791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:33,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:33,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:33,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257517756] [2021-06-05 05:12:33,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:33,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:33,131 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:33,454 INFO L93 Difference]: Finished difference Result 497 states and 1504 transitions. [2021-06-05 05:12:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:12:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:33,456 INFO L225 Difference]: With dead ends: 497 [2021-06-05 05:12:33,456 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 05:12:33,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 05:12:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 312. [2021-06-05 05:12:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-05 05:12:33,461 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-05 05:12:33,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:33,461 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-05 05:12:33,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,461 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-05 05:12:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:33,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:33,461 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:33,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:33,673 INFO L430 AbstractCegarLoop]: === Iteration 49 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1865369703, now seen corresponding path program 17 times [2021-06-05 05:12:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:33,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784413306] [2021-06-05 05:12:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:33,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:33,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784413306] [2021-06-05 05:12:33,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784413306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:33,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576451075] [2021-06-05 05:12:33,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:33,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:33,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:33,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:33,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:33,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:33,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:33,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:33,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:33,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576451075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:33,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:33,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:33,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764954840] [2021-06-05 05:12:33,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:33,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:33,855 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:34,040 INFO L93 Difference]: Finished difference Result 435 states and 1319 transitions. [2021-06-05 05:12:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:34,041 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:34,042 INFO L225 Difference]: With dead ends: 435 [2021-06-05 05:12:34,042 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 05:12:34,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 05:12:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-06-05 05:12:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1146496815286624) internal successors, (978), 314 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 978 transitions. [2021-06-05 05:12:34,046 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 978 transitions. Word has length 20 [2021-06-05 05:12:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:34,047 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 978 transitions. [2021-06-05 05:12:34,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 978 transitions. [2021-06-05 05:12:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:34,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:34,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:34,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 05:12:34,253 INFO L430 AbstractCegarLoop]: === Iteration 50 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1541783525, now seen corresponding path program 18 times [2021-06-05 05:12:34,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:34,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854783229] [2021-06-05 05:12:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:34,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:34,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854783229] [2021-06-05 05:12:34,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854783229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63126437] [2021-06-05 05:12:34,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:34,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:34,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:34,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:34,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:34,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:34,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:12:34,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:34,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:34,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:34,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 05:12:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:34,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63126437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:34,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:34,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982651811] [2021-06-05 05:12:34,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:34,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:34,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:34,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:34,449 INFO L87 Difference]: Start difference. First operand 315 states and 978 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:34,617 INFO L93 Difference]: Finished difference Result 432 states and 1315 transitions. [2021-06-05 05:12:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:34,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:34,618 INFO L225 Difference]: With dead ends: 432 [2021-06-05 05:12:34,618 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 05:12:34,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 05:12:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 312. [2021-06-05 05:12:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-05 05:12:34,622 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-05 05:12:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:34,622 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-05 05:12:34,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-05 05:12:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:34,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:34,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:34,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:34,825 INFO L430 AbstractCegarLoop]: === Iteration 51 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:34,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:34,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1004860857, now seen corresponding path program 18 times [2021-06-05 05:12:34,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:34,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814411510] [2021-06-05 05:12:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:34,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:34,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814411510] [2021-06-05 05:12:34,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814411510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26974140] [2021-06-05 05:12:34,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:34,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:34,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:34,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:12:34,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:35,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:35,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 05:12:35,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:35,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:35,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:35,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-06-05 05:12:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:35,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26974140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:35,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:35,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 05:12:35,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501250883] [2021-06-05 05:12:35,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:12:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:12:35,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:35,100 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:35,938 INFO L93 Difference]: Finished difference Result 644 states and 1918 transitions. [2021-06-05 05:12:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:12:35,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:35,939 INFO L225 Difference]: With dead ends: 644 [2021-06-05 05:12:35,939 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 05:12:35,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 605.1ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:12:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 05:12:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 316. [2021-06-05 05:12:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.111111111111111) internal successors, (980), 315 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 980 transitions. [2021-06-05 05:12:35,945 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 980 transitions. Word has length 20 [2021-06-05 05:12:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:35,945 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 980 transitions. [2021-06-05 05:12:35,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 980 transitions. [2021-06-05 05:12:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:35,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:35,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:36,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:36,158 INFO L430 AbstractCegarLoop]: === Iteration 52 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:36,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1209778991, now seen corresponding path program 19 times [2021-06-05 05:12:36,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:36,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738893119] [2021-06-05 05:12:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:36,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:36,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738893119] [2021-06-05 05:12:36,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738893119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:36,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937753759] [2021-06-05 05:12:36,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:36,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:36,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:36,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:36,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:12:36,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:36,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:12:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:36,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937753759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:36,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:36,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 05:12:36,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705345743] [2021-06-05 05:12:36,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:12:36,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:36,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:12:36,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:36,364 INFO L87 Difference]: Start difference. First operand 316 states and 980 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:36,570 INFO L93 Difference]: Finished difference Result 437 states and 1326 transitions. [2021-06-05 05:12:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:36,571 INFO L225 Difference]: With dead ends: 437 [2021-06-05 05:12:36,571 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 05:12:36,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 05:12:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-06-05 05:12:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1178343949044587) internal successors, (979), 314 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 979 transitions. [2021-06-05 05:12:36,576 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 979 transitions. Word has length 20 [2021-06-05 05:12:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:36,576 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 979 transitions. [2021-06-05 05:12:36,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 979 transitions. [2021-06-05 05:12:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:36,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:36,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:36,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:36,781 INFO L430 AbstractCegarLoop]: === Iteration 53 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1625404767, now seen corresponding path program 19 times [2021-06-05 05:12:36,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:36,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021148800] [2021-06-05 05:12:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:36,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:36,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021148800] [2021-06-05 05:12:36,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021148800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:36,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228793075] [2021-06-05 05:12:36,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:12:36,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:36,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:36,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:12:36,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:36,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:36,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 05:12:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:36,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228793075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:36,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:36,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 05:12:36,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307298813] [2021-06-05 05:12:36,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:36,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:36,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:36,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:36,996 INFO L87 Difference]: Start difference. First operand 315 states and 979 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:37,408 INFO L93 Difference]: Finished difference Result 577 states and 1769 transitions. [2021-06-05 05:12:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:12:37,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:37,409 INFO L225 Difference]: With dead ends: 577 [2021-06-05 05:12:37,409 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 05:12:37,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 05:12:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 323. [2021-06-05 05:12:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.1180124223602483) internal successors, (1004), 322 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1004 transitions. [2021-06-05 05:12:37,414 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1004 transitions. Word has length 20 [2021-06-05 05:12:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:37,414 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 1004 transitions. [2021-06-05 05:12:37,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1004 transitions. [2021-06-05 05:12:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:37,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:37,415 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:37,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 05:12:37,625 INFO L430 AbstractCegarLoop]: === Iteration 54 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:37,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1821665449, now seen corresponding path program 20 times [2021-06-05 05:12:37,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:37,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26012341] [2021-06-05 05:12:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:37,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:37,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26012341] [2021-06-05 05:12:37,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26012341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:37,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201224468] [2021-06-05 05:12:37,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:37,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:12:37,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:37,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:37,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 05:12:37,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:37,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:37,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:37,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:22 [2021-06-05 05:12:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:37,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201224468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:37,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:37,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 05:12:37,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31419674] [2021-06-05 05:12:37,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:12:37,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:37,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:12:37,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:12:37,847 INFO L87 Difference]: Start difference. First operand 323 states and 1004 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:38,174 INFO L93 Difference]: Finished difference Result 516 states and 1586 transitions. [2021-06-05 05:12:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:38,176 INFO L225 Difference]: With dead ends: 516 [2021-06-05 05:12:38,176 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 05:12:38,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 05:12:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 322. [2021-06-05 05:12:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.1246105919003115) internal successors, (1003), 321 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1003 transitions. [2021-06-05 05:12:38,180 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1003 transitions. Word has length 20 [2021-06-05 05:12:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:38,181 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1003 transitions. [2021-06-05 05:12:38,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1003 transitions. [2021-06-05 05:12:38,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:38,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:38,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:38,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:38,382 INFO L430 AbstractCegarLoop]: === Iteration 55 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -827696633, now seen corresponding path program 20 times [2021-06-05 05:12:38,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:38,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000527035] [2021-06-05 05:12:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:38,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:38,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000527035] [2021-06-05 05:12:38,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000527035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:38,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343483871] [2021-06-05 05:12:38,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:38,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:38,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:38,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:38,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:38,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343483871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:38,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:38,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:12:38,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440600409] [2021-06-05 05:12:38,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:12:38,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:38,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:12:38,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:12:38,466 INFO L87 Difference]: Start difference. First operand 322 states and 1003 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:38,520 INFO L93 Difference]: Finished difference Result 489 states and 1527 transitions. [2021-06-05 05:12:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:12:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:38,521 INFO L225 Difference]: With dead ends: 489 [2021-06-05 05:12:38,521 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 05:12:38,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 05:12:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 311. [2021-06-05 05:12:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.203225806451613) internal successors, (993), 310 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 993 transitions. [2021-06-05 05:12:38,525 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 993 transitions. Word has length 22 [2021-06-05 05:12:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:38,525 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 993 transitions. [2021-06-05 05:12:38,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 993 transitions. [2021-06-05 05:12:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:38,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:38,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:38,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:38,726 INFO L430 AbstractCegarLoop]: === Iteration 56 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash 196643718, now seen corresponding path program 21 times [2021-06-05 05:12:38,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:38,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127349826] [2021-06-05 05:12:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:38,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:38,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127349826] [2021-06-05 05:12:38,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127349826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:38,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064559598] [2021-06-05 05:12:38,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:38,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:38,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:38,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:38,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:38,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064559598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:38,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:38,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:12:38,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648245103] [2021-06-05 05:12:38,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:12:38,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:38,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:12:38,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:12:38,830 INFO L87 Difference]: Start difference. First operand 311 states and 993 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:38,910 INFO L93 Difference]: Finished difference Result 498 states and 1529 transitions. [2021-06-05 05:12:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:38,911 INFO L225 Difference]: With dead ends: 498 [2021-06-05 05:12:38,911 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 05:12:38,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 05:12:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 311. [2021-06-05 05:12:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.170967741935484) internal successors, (983), 310 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 983 transitions. [2021-06-05 05:12:38,915 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 983 transitions. Word has length 22 [2021-06-05 05:12:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:38,915 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 983 transitions. [2021-06-05 05:12:38,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 983 transitions. [2021-06-05 05:12:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:38,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:38,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:39,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 05:12:39,122 INFO L430 AbstractCegarLoop]: === Iteration 57 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:39,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1724048449, now seen corresponding path program 22 times [2021-06-05 05:12:39,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:39,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110164405] [2021-06-05 05:12:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110164405] [2021-06-05 05:12:39,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110164405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222678612] [2021-06-05 05:12:39,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:12:39,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:39,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:39,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222678612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:39,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512149311] [2021-06-05 05:12:39,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:39,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:39,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:39,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:39,222 INFO L87 Difference]: Start difference. First operand 311 states and 983 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:39,317 INFO L93 Difference]: Finished difference Result 640 states and 1919 transitions. [2021-06-05 05:12:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:12:39,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:39,319 INFO L225 Difference]: With dead ends: 640 [2021-06-05 05:12:39,319 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 05:12:39,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 05:12:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 368. [2021-06-05 05:12:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.231607629427793) internal successors, (1186), 367 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1186 transitions. [2021-06-05 05:12:39,324 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1186 transitions. Word has length 22 [2021-06-05 05:12:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:39,324 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1186 transitions. [2021-06-05 05:12:39,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1186 transitions. [2021-06-05 05:12:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:39,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:39,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:39,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:39,533 INFO L430 AbstractCegarLoop]: === Iteration 58 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:39,533 INFO L82 PathProgramCache]: Analyzing trace with hash 40343294, now seen corresponding path program 23 times [2021-06-05 05:12:39,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:39,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254323646] [2021-06-05 05:12:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:39,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254323646] [2021-06-05 05:12:39,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254323646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114315115] [2021-06-05 05:12:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:39,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:39,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114315115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:39,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:39,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118029508] [2021-06-05 05:12:39,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:39,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:39,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:39,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:39,629 INFO L87 Difference]: Start difference. First operand 368 states and 1186 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:39,755 INFO L93 Difference]: Finished difference Result 772 states and 2287 transitions. [2021-06-05 05:12:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:12:39,755 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:39,756 INFO L225 Difference]: With dead ends: 772 [2021-06-05 05:12:39,756 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 05:12:39,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 05:12:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-06-05 05:12:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.235643564356436) internal successors, (1634), 505 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1634 transitions. [2021-06-05 05:12:39,764 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1634 transitions. Word has length 22 [2021-06-05 05:12:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:39,764 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1634 transitions. [2021-06-05 05:12:39,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1634 transitions. [2021-06-05 05:12:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:39,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:39,765 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:39,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 05:12:39,981 INFO L430 AbstractCegarLoop]: === Iteration 59 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 358278619, now seen corresponding path program 24 times [2021-06-05 05:12:39,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:39,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323122030] [2021-06-05 05:12:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:39,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323122030] [2021-06-05 05:12:39,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323122030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289796743] [2021-06-05 05:12:39,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:40,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:40,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:40,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289796743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:40,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:40,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:40,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504227715] [2021-06-05 05:12:40,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:40,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:40,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:40,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:40,070 INFO L87 Difference]: Start difference. First operand 506 states and 1634 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:40,177 INFO L93 Difference]: Finished difference Result 972 states and 2907 transitions. [2021-06-05 05:12:40,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:40,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:40,179 INFO L225 Difference]: With dead ends: 972 [2021-06-05 05:12:40,179 INFO L226 Difference]: Without dead ends: 972 [2021-06-05 05:12:40,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:40,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-05 05:12:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 557. [2021-06-05 05:12:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.318345323741007) internal successors, (1845), 556 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1845 transitions. [2021-06-05 05:12:40,187 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1845 transitions. Word has length 22 [2021-06-05 05:12:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:40,187 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1845 transitions. [2021-06-05 05:12:40,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1845 transitions. [2021-06-05 05:12:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:40,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:40,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:40,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:40,388 INFO L430 AbstractCegarLoop]: === Iteration 60 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:40,389 INFO L82 PathProgramCache]: Analyzing trace with hash -527046306, now seen corresponding path program 25 times [2021-06-05 05:12:40,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:40,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965108685] [2021-06-05 05:12:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:40,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:40,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965108685] [2021-06-05 05:12:40,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965108685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:40,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384417220] [2021-06-05 05:12:40,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:40,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384417220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:40,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:40,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:40,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75108245] [2021-06-05 05:12:40,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:40,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:40,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:40,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:40,478 INFO L87 Difference]: Start difference. First operand 557 states and 1845 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:40,624 INFO L93 Difference]: Finished difference Result 964 states and 2972 transitions. [2021-06-05 05:12:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:12:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:40,626 INFO L225 Difference]: With dead ends: 964 [2021-06-05 05:12:40,626 INFO L226 Difference]: Without dead ends: 916 [2021-06-05 05:12:40,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-06-05 05:12:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 606. [2021-06-05 05:12:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3338842975206613) internal successors, (2017), 605 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2017 transitions. [2021-06-05 05:12:40,635 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2017 transitions. Word has length 22 [2021-06-05 05:12:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:40,635 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 2017 transitions. [2021-06-05 05:12:40,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2017 transitions. [2021-06-05 05:12:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:40,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:40,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:40,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 05:12:40,837 INFO L430 AbstractCegarLoop]: === Iteration 61 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:40,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1135425701, now seen corresponding path program 26 times [2021-06-05 05:12:40,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:40,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142779576] [2021-06-05 05:12:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:40,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:40,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142779576] [2021-06-05 05:12:40,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142779576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:40,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045477001] [2021-06-05 05:12:40,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:40,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:40,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:40,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:40,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045477001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:40,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:40,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:40,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861144449] [2021-06-05 05:12:40,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:40,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:40,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:40,918 INFO L87 Difference]: Start difference. First operand 606 states and 2017 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:41,050 INFO L93 Difference]: Finished difference Result 881 states and 2727 transitions. [2021-06-05 05:12:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:12:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:41,052 INFO L225 Difference]: With dead ends: 881 [2021-06-05 05:12:41,052 INFO L226 Difference]: Without dead ends: 871 [2021-06-05 05:12:41,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-06-05 05:12:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 612. [2021-06-05 05:12:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.3060556464811786) internal successors, (2020), 611 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2020 transitions. [2021-06-05 05:12:41,070 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2020 transitions. Word has length 22 [2021-06-05 05:12:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:41,070 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 2020 transitions. [2021-06-05 05:12:41,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2020 transitions. [2021-06-05 05:12:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:41,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:41,071 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:41,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 05:12:41,287 INFO L430 AbstractCegarLoop]: === Iteration 62 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:41,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:41,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1507852130, now seen corresponding path program 27 times [2021-06-05 05:12:41,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:41,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738334587] [2021-06-05 05:12:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:41,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738334587] [2021-06-05 05:12:41,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738334587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799590611] [2021-06-05 05:12:41,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:41,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:41,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:41,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:41,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799590611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:41,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:41,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847233136] [2021-06-05 05:12:41,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:41,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:41,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:41,391 INFO L87 Difference]: Start difference. First operand 612 states and 2020 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:41,538 INFO L93 Difference]: Finished difference Result 917 states and 2822 transitions. [2021-06-05 05:12:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:12:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:41,540 INFO L225 Difference]: With dead ends: 917 [2021-06-05 05:12:41,540 INFO L226 Difference]: Without dead ends: 893 [2021-06-05 05:12:41,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-06-05 05:12:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 606. [2021-06-05 05:12:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3239669421487603) internal successors, (2011), 605 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2011 transitions. [2021-06-05 05:12:41,549 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2011 transitions. Word has length 22 [2021-06-05 05:12:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:41,550 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 2011 transitions. [2021-06-05 05:12:41,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2011 transitions. [2021-06-05 05:12:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:41,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:41,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:41,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:41,753 INFO L430 AbstractCegarLoop]: === Iteration 63 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:41,753 INFO L82 PathProgramCache]: Analyzing trace with hash 326583295, now seen corresponding path program 28 times [2021-06-05 05:12:41,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:41,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096925424] [2021-06-05 05:12:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:41,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096925424] [2021-06-05 05:12:41,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096925424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006118618] [2021-06-05 05:12:41,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:41,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:41,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:41,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006118618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:41,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:12:41,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929419964] [2021-06-05 05:12:41,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:12:41,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:41,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:12:41,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:12:41,855 INFO L87 Difference]: Start difference. First operand 606 states and 2011 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:41,985 INFO L93 Difference]: Finished difference Result 1221 states and 3751 transitions. [2021-06-05 05:12:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:12:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:41,990 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 05:12:41,990 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 05:12:41,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 05:12:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 650. [2021-06-05 05:12:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.362095531587057) internal successors, (2182), 649 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2182 transitions. [2021-06-05 05:12:42,001 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2182 transitions. Word has length 22 [2021-06-05 05:12:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:42,001 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 2182 transitions. [2021-06-05 05:12:42,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2182 transitions. [2021-06-05 05:12:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:42,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:42,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:42,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:42,218 INFO L430 AbstractCegarLoop]: === Iteration 64 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:42,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:42,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1657114921, now seen corresponding path program 29 times [2021-06-05 05:12:42,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:42,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095834290] [2021-06-05 05:12:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:42,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:42,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095834290] [2021-06-05 05:12:42,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095834290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:42,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640462195] [2021-06-05 05:12:42,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:42,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:12:42,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:42,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:42,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640462195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:42,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:42,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:12:42,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916703530] [2021-06-05 05:12:42,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:42,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:42,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:42,307 INFO L87 Difference]: Start difference. First operand 650 states and 2182 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:42,412 INFO L93 Difference]: Finished difference Result 1386 states and 4279 transitions. [2021-06-05 05:12:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:42,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:42,414 INFO L225 Difference]: With dead ends: 1386 [2021-06-05 05:12:42,414 INFO L226 Difference]: Without dead ends: 1386 [2021-06-05 05:12:42,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:42,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-06-05 05:12:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 762. [2021-06-05 05:12:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4480946123521683) internal successors, (2624), 761 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2624 transitions. [2021-06-05 05:12:42,426 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2624 transitions. Word has length 22 [2021-06-05 05:12:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:42,426 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2624 transitions. [2021-06-05 05:12:42,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2624 transitions. [2021-06-05 05:12:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:42,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:42,427 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:42,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:42,643 INFO L430 AbstractCegarLoop]: === Iteration 65 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1144148055, now seen corresponding path program 30 times [2021-06-05 05:12:42,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:42,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649834119] [2021-06-05 05:12:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:12:42,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:42,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649834119] [2021-06-05 05:12:42,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649834119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:42,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850829931] [2021-06-05 05:12:42,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:12:42,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:42,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:42,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:42,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:42,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850829931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:42,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:42,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:12:42,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206383834] [2021-06-05 05:12:42,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:42,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:42,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:42,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:42,724 INFO L87 Difference]: Start difference. First operand 762 states and 2624 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:42,866 INFO L93 Difference]: Finished difference Result 1253 states and 3889 transitions. [2021-06-05 05:12:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:12:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:42,882 INFO L225 Difference]: With dead ends: 1253 [2021-06-05 05:12:42,882 INFO L226 Difference]: Without dead ends: 1244 [2021-06-05 05:12:42,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-05 05:12:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 762. [2021-06-05 05:12:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4191852825229962) internal successors, (2602), 761 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2602 transitions. [2021-06-05 05:12:42,894 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2602 transitions. Word has length 22 [2021-06-05 05:12:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:42,894 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2602 transitions. [2021-06-05 05:12:42,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2602 transitions. [2021-06-05 05:12:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:42,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:42,895 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:43,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:43,111 INFO L430 AbstractCegarLoop]: === Iteration 66 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:43,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1294632791, now seen corresponding path program 31 times [2021-06-05 05:12:43,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:43,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172445739] [2021-06-05 05:12:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:43,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:43,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172445739] [2021-06-05 05:12:43,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172445739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:43,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574647007] [2021-06-05 05:12:43,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:43,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:43,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:43,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574647007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:43,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:43,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:12:43,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117914040] [2021-06-05 05:12:43,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:12:43,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:43,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:12:43,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:12:43,225 INFO L87 Difference]: Start difference. First operand 762 states and 2602 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:43,381 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-06-05 05:12:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:12:43,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:43,383 INFO L225 Difference]: With dead ends: 1263 [2021-06-05 05:12:43,383 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 05:12:43,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 05:12:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 847. [2021-06-05 05:12:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.4539007092198584) internal successors, (2922), 846 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2922 transitions. [2021-06-05 05:12:43,396 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2922 transitions. Word has length 22 [2021-06-05 05:12:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:43,396 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2922 transitions. [2021-06-05 05:12:43,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2922 transitions. [2021-06-05 05:12:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:43,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:43,397 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:43,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:43,598 INFO L430 AbstractCegarLoop]: === Iteration 67 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1456964799, now seen corresponding path program 32 times [2021-06-05 05:12:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:43,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339109678] [2021-06-05 05:12:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:43,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:43,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339109678] [2021-06-05 05:12:43,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339109678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:43,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809092545] [2021-06-05 05:12:43,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:43,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:43,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:43,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:43,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809092545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:43,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:43,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:12:43,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657515441] [2021-06-05 05:12:43,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:12:43,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:12:43,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:12:43,693 INFO L87 Difference]: Start difference. First operand 847 states and 2922 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:43,821 INFO L93 Difference]: Finished difference Result 1246 states and 3991 transitions. [2021-06-05 05:12:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:12:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:43,823 INFO L225 Difference]: With dead ends: 1246 [2021-06-05 05:12:43,823 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 05:12:43,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 05:12:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 888. [2021-06-05 05:12:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.47576099210823) internal successors, (3083), 887 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3083 transitions. [2021-06-05 05:12:43,837 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3083 transitions. Word has length 22 [2021-06-05 05:12:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:43,837 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3083 transitions. [2021-06-05 05:12:43,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3083 transitions. [2021-06-05 05:12:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:43,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:43,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:44,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:44,039 INFO L430 AbstractCegarLoop]: === Iteration 68 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:44,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:44,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1570199292, now seen corresponding path program 33 times [2021-06-05 05:12:44,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:44,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958428314] [2021-06-05 05:12:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:44,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:44,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958428314] [2021-06-05 05:12:44,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958428314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007439145] [2021-06-05 05:12:44,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:44,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:44,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:44,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:44,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007439145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:44,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:12:44,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116555683] [2021-06-05 05:12:44,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:12:44,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:44,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:12:44,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:12:44,130 INFO L87 Difference]: Start difference. First operand 888 states and 3083 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:44,324 INFO L93 Difference]: Finished difference Result 1362 states and 4328 transitions. [2021-06-05 05:12:44,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:12:44,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:44,326 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 05:12:44,326 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 05:12:44,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:12:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 05:12:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 976. [2021-06-05 05:12:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.4574358974358974) internal successors, (3371), 975 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3371 transitions. [2021-06-05 05:12:44,345 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3371 transitions. Word has length 22 [2021-06-05 05:12:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:44,345 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 3371 transitions. [2021-06-05 05:12:44,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,345 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3371 transitions. [2021-06-05 05:12:44,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:44,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:44,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:44,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:44,561 INFO L430 AbstractCegarLoop]: === Iteration 69 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:44,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:44,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1138465271, now seen corresponding path program 34 times [2021-06-05 05:12:44,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:44,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690134261] [2021-06-05 05:12:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:44,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690134261] [2021-06-05 05:12:44,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690134261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37543879] [2021-06-05 05:12:44,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:44,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:44,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:44,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37543879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:44,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:12:44,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648737753] [2021-06-05 05:12:44,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:44,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:44,650 INFO L87 Difference]: Start difference. First operand 976 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:44,761 INFO L93 Difference]: Finished difference Result 1340 states and 4319 transitions. [2021-06-05 05:12:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:12:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:44,764 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 05:12:44,764 INFO L226 Difference]: Without dead ends: 1331 [2021-06-05 05:12:44,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:12:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-05 05:12:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 928. [2021-06-05 05:12:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.4217907227615965) internal successors, (3172), 927 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3172 transitions. [2021-06-05 05:12:44,785 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3172 transitions. Word has length 22 [2021-06-05 05:12:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:44,785 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3172 transitions. [2021-06-05 05:12:44,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3172 transitions. [2021-06-05 05:12:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:44,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:44,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:45,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:45,001 INFO L430 AbstractCegarLoop]: === Iteration 70 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:45,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1510891700, now seen corresponding path program 35 times [2021-06-05 05:12:45,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:45,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992633693] [2021-06-05 05:12:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:45,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:45,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992633693] [2021-06-05 05:12:45,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992633693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550694154] [2021-06-05 05:12:45,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:45,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:45,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:45,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:45,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:45,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550694154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:45,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:12:45,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632473176] [2021-06-05 05:12:45,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:45,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:45,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:45,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:45,088 INFO L87 Difference]: Start difference. First operand 928 states and 3172 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:45,193 INFO L93 Difference]: Finished difference Result 1477 states and 4669 transitions. [2021-06-05 05:12:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:45,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:45,195 INFO L225 Difference]: With dead ends: 1477 [2021-06-05 05:12:45,195 INFO L226 Difference]: Without dead ends: 1435 [2021-06-05 05:12:45,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-06-05 05:12:45,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1075. [2021-06-05 05:12:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 3.4320297951582868) internal successors, (3686), 1074 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3686 transitions. [2021-06-05 05:12:45,214 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3686 transitions. Word has length 22 [2021-06-05 05:12:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:45,214 INFO L482 AbstractCegarLoop]: Abstraction has 1075 states and 3686 transitions. [2021-06-05 05:12:45,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3686 transitions. [2021-06-05 05:12:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:45,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:45,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:45,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 05:12:45,431 INFO L430 AbstractCegarLoop]: === Iteration 71 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:45,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1381268681, now seen corresponding path program 36 times [2021-06-05 05:12:45,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:45,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764315792] [2021-06-05 05:12:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:45,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:45,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764315792] [2021-06-05 05:12:45,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764315792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389674290] [2021-06-05 05:12:45,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:45,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:12:45,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:45,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:45,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389674290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:45,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:12:45,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044703622] [2021-06-05 05:12:45,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:45,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:45,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:45,522 INFO L87 Difference]: Start difference. First operand 1075 states and 3686 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:45,627 INFO L93 Difference]: Finished difference Result 1825 states and 5875 transitions. [2021-06-05 05:12:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:45,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:45,630 INFO L225 Difference]: With dead ends: 1825 [2021-06-05 05:12:45,630 INFO L226 Difference]: Without dead ends: 1825 [2021-06-05 05:12:45,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-06-05 05:12:45,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1237. [2021-06-05 05:12:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 3.5032362459546924) internal successors, (4330), 1236 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4330 transitions. [2021-06-05 05:12:45,649 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4330 transitions. Word has length 22 [2021-06-05 05:12:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:45,649 INFO L482 AbstractCegarLoop]: Abstraction has 1237 states and 4330 transitions. [2021-06-05 05:12:45,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4330 transitions. [2021-06-05 05:12:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:45,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:45,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:45,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:45,865 INFO L430 AbstractCegarLoop]: === Iteration 72 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:45,865 INFO L82 PathProgramCache]: Analyzing trace with hash 495943756, now seen corresponding path program 37 times [2021-06-05 05:12:45,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:45,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281853489] [2021-06-05 05:12:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:45,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:45,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281853489] [2021-06-05 05:12:45,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281853489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213616606] [2021-06-05 05:12:45,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:45,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213616606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:45,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:12:45,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078693335] [2021-06-05 05:12:45,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:45,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:45,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:45,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:45,951 INFO L87 Difference]: Start difference. First operand 1237 states and 4330 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:46,085 INFO L93 Difference]: Finished difference Result 1507 states and 5030 transitions. [2021-06-05 05:12:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:12:46,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:46,087 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 05:12:46,087 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 05:12:46,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 05:12:46,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1278. [2021-06-05 05:12:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.534064212999217) internal successors, (4513), 1277 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4513 transitions. [2021-06-05 05:12:46,105 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4513 transitions. Word has length 22 [2021-06-05 05:12:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:46,105 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4513 transitions. [2021-06-05 05:12:46,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4513 transitions. [2021-06-05 05:12:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:46,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:46,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:46,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 05:12:46,309 INFO L430 AbstractCegarLoop]: === Iteration 73 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash -112435639, now seen corresponding path program 38 times [2021-06-05 05:12:46,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:46,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356334886] [2021-06-05 05:12:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:12:46,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:46,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356334886] [2021-06-05 05:12:46,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356334886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:46,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529021899] [2021-06-05 05:12:46,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:46,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:46,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:46,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529021899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:46,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:46,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 05:12:46,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429333927] [2021-06-05 05:12:46,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:46,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:46,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:46,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:46,396 INFO L87 Difference]: Start difference. First operand 1278 states and 4513 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:46,521 INFO L93 Difference]: Finished difference Result 1841 states and 5998 transitions. [2021-06-05 05:12:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:12:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:46,523 INFO L225 Difference]: With dead ends: 1841 [2021-06-05 05:12:46,523 INFO L226 Difference]: Without dead ends: 1832 [2021-06-05 05:12:46,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:12:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-06-05 05:12:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1224. [2021-06-05 05:12:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.493049877350777) internal successors, (4272), 1223 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4272 transitions. [2021-06-05 05:12:46,547 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4272 transitions. Word has length 22 [2021-06-05 05:12:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:46,548 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 4272 transitions. [2021-06-05 05:12:46,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4272 transitions. [2021-06-05 05:12:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:46,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:46,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:46,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:46,750 INFO L430 AbstractCegarLoop]: === Iteration 74 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:46,750 INFO L82 PathProgramCache]: Analyzing trace with hash 38049097, now seen corresponding path program 39 times [2021-06-05 05:12:46,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:46,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363268355] [2021-06-05 05:12:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:46,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:46,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363268355] [2021-06-05 05:12:46,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363268355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:46,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970120122] [2021-06-05 05:12:46,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:46,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:46,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:46,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:46,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:46,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970120122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:46,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:46,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:12:46,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350552722] [2021-06-05 05:12:46,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:12:46,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:12:46,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:12:46,839 INFO L87 Difference]: Start difference. First operand 1224 states and 4272 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:46,984 INFO L93 Difference]: Finished difference Result 1811 states and 5904 transitions. [2021-06-05 05:12:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:12:46,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:46,987 INFO L225 Difference]: With dead ends: 1811 [2021-06-05 05:12:46,987 INFO L226 Difference]: Without dead ends: 1799 [2021-06-05 05:12:46,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-06-05 05:12:47,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1222. [2021-06-05 05:12:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.493038493038493) internal successors, (4265), 1221 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4265 transitions. [2021-06-05 05:12:47,005 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4265 transitions. Word has length 22 [2021-06-05 05:12:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:47,005 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4265 transitions. [2021-06-05 05:12:47,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4265 transitions. [2021-06-05 05:12:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:47,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:47,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:47,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 05:12:47,208 INFO L430 AbstractCegarLoop]: === Iteration 75 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash 414299473, now seen corresponding path program 40 times [2021-06-05 05:12:47,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:47,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486885646] [2021-06-05 05:12:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:47,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:47,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486885646] [2021-06-05 05:12:47,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486885646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:47,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126750151] [2021-06-05 05:12:47,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:47,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:47,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:47,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:47,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:47,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126750151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:47,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:47,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:47,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577440562] [2021-06-05 05:12:47,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:47,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:47,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:47,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:47,306 INFO L87 Difference]: Start difference. First operand 1222 states and 4265 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:47,417 INFO L93 Difference]: Finished difference Result 2184 states and 7117 transitions. [2021-06-05 05:12:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:12:47,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:47,420 INFO L225 Difference]: With dead ends: 2184 [2021-06-05 05:12:47,420 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 05:12:47,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:12:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 05:12:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1282. [2021-06-05 05:12:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.527712724434036) internal successors, (4519), 1281 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4519 transitions. [2021-06-05 05:12:47,442 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4519 transitions. Word has length 22 [2021-06-05 05:12:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:47,442 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4519 transitions. [2021-06-05 05:12:47,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4519 transitions. [2021-06-05 05:12:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:47,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:47,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:47,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:47,660 INFO L430 AbstractCegarLoop]: === Iteration 76 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash -254499376, now seen corresponding path program 41 times [2021-06-05 05:12:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:47,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886748860] [2021-06-05 05:12:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:47,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:47,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886748860] [2021-06-05 05:12:47,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886748860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:47,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054584841] [2021-06-05 05:12:47,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:12:47,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:47,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:47,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:47,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054584841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:47,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:47,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:47,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254459315] [2021-06-05 05:12:47,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:47,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:47,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:47,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:47,767 INFO L87 Difference]: Start difference. First operand 1282 states and 4519 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:47,945 INFO L93 Difference]: Finished difference Result 1724 states and 5684 transitions. [2021-06-05 05:12:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:12:47,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:47,948 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 05:12:47,948 INFO L226 Difference]: Without dead ends: 1690 [2021-06-05 05:12:47,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-05 05:12:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1281. [2021-06-05 05:12:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.51484375) internal successors, (4499), 1280 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4499 transitions. [2021-06-05 05:12:47,968 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4499 transitions. Word has length 22 [2021-06-05 05:12:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:47,968 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4499 transitions. [2021-06-05 05:12:47,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4499 transitions. [2021-06-05 05:12:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:47,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:47,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:48,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 05:12:48,181 INFO L430 AbstractCegarLoop]: === Iteration 77 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash -811023835, now seen corresponding path program 42 times [2021-06-05 05:12:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:48,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313610513] [2021-06-05 05:12:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:48,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313610513] [2021-06-05 05:12:48,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313610513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387171936] [2021-06-05 05:12:48,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:48,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:12:48,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:48,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:48,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387171936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:48,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:48,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420791539] [2021-06-05 05:12:48,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:48,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:48,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:48,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:48,270 INFO L87 Difference]: Start difference. First operand 1281 states and 4499 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:48,423 INFO L93 Difference]: Finished difference Result 2125 states and 6947 transitions. [2021-06-05 05:12:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:12:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:48,427 INFO L225 Difference]: With dead ends: 2125 [2021-06-05 05:12:48,427 INFO L226 Difference]: Without dead ends: 2116 [2021-06-05 05:12:48,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:12:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-06-05 05:12:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1245. [2021-06-05 05:12:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.485530546623794) internal successors, (4336), 1244 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4336 transitions. [2021-06-05 05:12:48,447 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4336 transitions. Word has length 22 [2021-06-05 05:12:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:48,447 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 4336 transitions. [2021-06-05 05:12:48,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4336 transitions. [2021-06-05 05:12:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:48,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:48,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:48,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 05:12:48,665 INFO L430 AbstractCegarLoop]: === Iteration 78 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1183450264, now seen corresponding path program 43 times [2021-06-05 05:12:48,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:48,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399854218] [2021-06-05 05:12:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:48,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:48,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399854218] [2021-06-05 05:12:48,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399854218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561464579] [2021-06-05 05:12:48,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:48,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:48,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561464579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:48,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:48,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193888484] [2021-06-05 05:12:48,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:48,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:48,758 INFO L87 Difference]: Start difference. First operand 1245 states and 4336 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:48,856 INFO L93 Difference]: Finished difference Result 1497 states and 4889 transitions. [2021-06-05 05:12:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:12:48,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:48,859 INFO L225 Difference]: With dead ends: 1497 [2021-06-05 05:12:48,859 INFO L226 Difference]: Without dead ends: 1497 [2021-06-05 05:12:48,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:12:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-06-05 05:12:48,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1200. [2021-06-05 05:12:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.433694745621351) internal successors, (4117), 1199 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4117 transitions. [2021-06-05 05:12:48,874 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4117 transitions. Word has length 22 [2021-06-05 05:12:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:48,874 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 4117 transitions. [2021-06-05 05:12:48,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4117 transitions. [2021-06-05 05:12:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:48,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:48,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:49,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 05:12:49,077 INFO L430 AbstractCegarLoop]: === Iteration 79 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash -496279263, now seen corresponding path program 44 times [2021-06-05 05:12:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:49,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874551784] [2021-06-05 05:12:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:49,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:49,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874551784] [2021-06-05 05:12:49,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874551784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:49,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560974737] [2021-06-05 05:12:49,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:12:49,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:49,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:49,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:49,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560974737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:49,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:49,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:12:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734647536] [2021-06-05 05:12:49,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:12:49,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:12:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:12:49,185 INFO L87 Difference]: Start difference. First operand 1200 states and 4117 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:49,316 INFO L93 Difference]: Finished difference Result 1698 states and 5519 transitions. [2021-06-05 05:12:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:12:49,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:49,319 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 05:12:49,319 INFO L226 Difference]: Without dead ends: 1690 [2021-06-05 05:12:49,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:12:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-05 05:12:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1200. [2021-06-05 05:12:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.4286905754795662) internal successors, (4111), 1199 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4111 transitions. [2021-06-05 05:12:49,336 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4111 transitions. Word has length 22 [2021-06-05 05:12:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:49,336 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 4111 transitions. [2021-06-05 05:12:49,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4111 transitions. [2021-06-05 05:12:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:49,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:49,338 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:49,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:49,545 INFO L430 AbstractCegarLoop]: === Iteration 80 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:49,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:49,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1029973939, now seen corresponding path program 45 times [2021-06-05 05:12:49,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:49,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164134755] [2021-06-05 05:12:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:49,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:49,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164134755] [2021-06-05 05:12:49,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164134755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:49,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214245167] [2021-06-05 05:12:49,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:49,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:12:49,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:49,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:49,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214245167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:49,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:49,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:12:49,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21355254] [2021-06-05 05:12:49,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:12:49,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:49,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:12:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:12:49,667 INFO L87 Difference]: Start difference. First operand 1200 states and 4111 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:49,719 INFO L93 Difference]: Finished difference Result 1428 states and 4807 transitions. [2021-06-05 05:12:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:12:49,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:49,721 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 05:12:49,721 INFO L226 Difference]: Without dead ends: 1419 [2021-06-05 05:12:49,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:12:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-06-05 05:12:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1199. [2021-06-05 05:12:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 3.4298831385642736) internal successors, (4109), 1198 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 4109 transitions. [2021-06-05 05:12:49,735 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 4109 transitions. Word has length 22 [2021-06-05 05:12:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:49,735 INFO L482 AbstractCegarLoop]: Abstraction has 1199 states and 4109 transitions. [2021-06-05 05:12:49,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 4109 transitions. [2021-06-05 05:12:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:12:49,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:49,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:49,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 05:12:49,938 INFO L430 AbstractCegarLoop]: === Iteration 81 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash -736606674, now seen corresponding path program 46 times [2021-06-05 05:12:49,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:49,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515046463] [2021-06-05 05:12:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:49,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:49,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515046463] [2021-06-05 05:12:49,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515046463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:49,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107867466] [2021-06-05 05:12:49,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:49,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:49,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:12:49,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:50,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107867466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:50,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:12:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398443244] [2021-06-05 05:12:50,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:12:50,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:12:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:12:50,019 INFO L87 Difference]: Start difference. First operand 1199 states and 4109 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:50,077 INFO L93 Difference]: Finished difference Result 1470 states and 4948 transitions. [2021-06-05 05:12:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:12:50,078 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:12:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:50,079 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 05:12:50,079 INFO L226 Difference]: Without dead ends: 1470 [2021-06-05 05:12:50,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:12:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-05 05:12:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1208. [2021-06-05 05:12:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 3.432477216238608) internal successors, (4143), 1207 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4143 transitions. [2021-06-05 05:12:50,093 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4143 transitions. Word has length 22 [2021-06-05 05:12:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:50,094 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 4143 transitions. [2021-06-05 05:12:50,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4143 transitions. [2021-06-05 05:12:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:12:50,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:50,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:50,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:50,309 INFO L430 AbstractCegarLoop]: === Iteration 82 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash -834579384, now seen corresponding path program 47 times [2021-06-05 05:12:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:50,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122595594] [2021-06-05 05:12:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:50,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:50,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122595594] [2021-06-05 05:12:50,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122595594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858818882] [2021-06-05 05:12:50,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:50,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:12:50,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:50,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:50,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:12:50,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:50,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:50,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:50,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:12:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:50,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858818882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:50,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:50,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:12:50,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914520567] [2021-06-05 05:12:50,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:50,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:50,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:50,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:50,678 INFO L87 Difference]: Start difference. First operand 1208 states and 4143 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:53,853 INFO L93 Difference]: Finished difference Result 4448 states and 15165 transitions. [2021-06-05 05:12:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:12:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:12:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:53,859 INFO L225 Difference]: With dead ends: 4448 [2021-06-05 05:12:53,860 INFO L226 Difference]: Without dead ends: 4426 [2021-06-05 05:12:53,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2442.8ms TimeCoverageRelationStatistics Valid=1022, Invalid=5620, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:12:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-05 05:12:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 1303. [2021-06-05 05:12:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.4400921658986174) internal successors, (4479), 1302 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4479 transitions. [2021-06-05 05:12:53,890 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4479 transitions. Word has length 24 [2021-06-05 05:12:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:53,890 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4479 transitions. [2021-06-05 05:12:53,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4479 transitions. [2021-06-05 05:12:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:12:53,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:53,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:54,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 05:12:54,097 INFO L430 AbstractCegarLoop]: === Iteration 83 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash 965720304, now seen corresponding path program 48 times [2021-06-05 05:12:54,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:54,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28694802] [2021-06-05 05:12:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:54,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:54,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28694802] [2021-06-05 05:12:54,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28694802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:54,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870442606] [2021-06-05 05:12:54,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:54,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:12:54,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:12:54,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:54,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:54,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:54,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 05:12:54,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:54,553 INFO L628 ElimStorePlain]: treesize reduction 37, result has 49.3 percent of original size [2021-06-05 05:12:54,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:54,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 05:12:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:54,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870442606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:54,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:54,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-05 05:12:54,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078557442] [2021-06-05 05:12:54,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:12:54,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:54,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:12:54,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:54,647 INFO L87 Difference]: Start difference. First operand 1303 states and 4479 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:57,334 INFO L93 Difference]: Finished difference Result 2829 states and 9372 transitions. [2021-06-05 05:12:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:12:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:12:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:57,338 INFO L225 Difference]: With dead ends: 2829 [2021-06-05 05:12:57,338 INFO L226 Difference]: Without dead ends: 2799 [2021-06-05 05:12:57,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2092.8ms TimeCoverageRelationStatistics Valid=661, Invalid=3121, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:12:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-05 05:12:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1316. [2021-06-05 05:12:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 3.4403041825095055) internal successors, (4524), 1315 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4524 transitions. [2021-06-05 05:12:57,362 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4524 transitions. Word has length 24 [2021-06-05 05:12:57,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:57,362 INFO L482 AbstractCegarLoop]: Abstraction has 1316 states and 4524 transitions. [2021-06-05 05:12:57,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:57,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4524 transitions. [2021-06-05 05:12:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:12:57,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:57,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:57,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:57,564 INFO L430 AbstractCegarLoop]: === Iteration 84 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1186871304, now seen corresponding path program 49 times [2021-06-05 05:12:57,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:57,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35959030] [2021-06-05 05:12:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:57,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:57,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35959030] [2021-06-05 05:12:57,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35959030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285861475] [2021-06-05 05:12:57,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:57,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:57,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:12:57,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:57,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:57,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:57,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:12:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:57,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285861475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:57,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:12:57,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998240432] [2021-06-05 05:12:57,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:57,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:57,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:57,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:57,925 INFO L87 Difference]: Start difference. First operand 1316 states and 4524 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:59,386 INFO L93 Difference]: Finished difference Result 2754 states and 9152 transitions. [2021-06-05 05:12:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:12:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:12:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:59,390 INFO L225 Difference]: With dead ends: 2754 [2021-06-05 05:12:59,390 INFO L226 Difference]: Without dead ends: 2720 [2021-06-05 05:12:59,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1145.8ms TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:12:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-06-05 05:12:59,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1330. [2021-06-05 05:12:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.443190368698269) internal successors, (4576), 1329 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4576 transitions. [2021-06-05 05:12:59,414 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4576 transitions. Word has length 24 [2021-06-05 05:12:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:59,414 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4576 transitions. [2021-06-05 05:12:59,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4576 transitions. [2021-06-05 05:12:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:12:59,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:59,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:59,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:59,625 INFO L430 AbstractCegarLoop]: === Iteration 85 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:12:59,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash 749372208, now seen corresponding path program 50 times [2021-06-05 05:12:59,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:59,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619062782] [2021-06-05 05:12:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:59,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:59,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619062782] [2021-06-05 05:12:59,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619062782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:59,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785523378] [2021-06-05 05:12:59,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:59,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:59,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:59,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:12:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:00,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:00,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:00,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:00,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:00,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 05:13:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:00,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785523378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:00,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:00,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:13:00,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000783126] [2021-06-05 05:13:00,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:13:00,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:00,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:13:00,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:00,059 INFO L87 Difference]: Start difference. First operand 1330 states and 4576 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:00,964 INFO L93 Difference]: Finished difference Result 2450 states and 8194 transitions. [2021-06-05 05:13:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:13:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:00,968 INFO L225 Difference]: With dead ends: 2450 [2021-06-05 05:13:00,968 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 05:13:00,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 748.3ms TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:13:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 05:13:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1349. [2021-06-05 05:13:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.438427299703264) internal successors, (4635), 1348 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4635 transitions. [2021-06-05 05:13:00,987 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4635 transitions. Word has length 24 [2021-06-05 05:13:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:00,993 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4635 transitions. [2021-06-05 05:13:00,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4635 transitions. [2021-06-05 05:13:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:00,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:00,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:01,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:01,196 INFO L430 AbstractCegarLoop]: === Iteration 86 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:01,197 INFO L82 PathProgramCache]: Analyzing trace with hash 572830776, now seen corresponding path program 51 times [2021-06-05 05:13:01,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:01,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115643609] [2021-06-05 05:13:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:01,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115643609] [2021-06-05 05:13:01,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115643609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720716759] [2021-06-05 05:13:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:01,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:13:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:01,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:01,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:01,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:01,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:01,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:13:01,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:01,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:01,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:01,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 05:13:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:01,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720716759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:01,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:01,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:13:01,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659954240] [2021-06-05 05:13:01,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:01,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:01,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:01,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:01,676 INFO L87 Difference]: Start difference. First operand 1349 states and 4635 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:03,244 INFO L93 Difference]: Finished difference Result 2472 states and 8251 transitions. [2021-06-05 05:13:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:13:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:03,248 INFO L225 Difference]: With dead ends: 2472 [2021-06-05 05:13:03,248 INFO L226 Difference]: Without dead ends: 2452 [2021-06-05 05:13:03,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1325.4ms TimeCoverageRelationStatistics Valid=478, Invalid=2602, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:13:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-05 05:13:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1352. [2021-06-05 05:13:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.4374537379718726) internal successors, (4644), 1351 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4644 transitions. [2021-06-05 05:13:03,269 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4644 transitions. Word has length 24 [2021-06-05 05:13:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:03,269 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4644 transitions. [2021-06-05 05:13:03,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4644 transitions. [2021-06-05 05:13:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:03,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:03,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:03,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:03,472 INFO L430 AbstractCegarLoop]: === Iteration 87 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:03,472 INFO L82 PathProgramCache]: Analyzing trace with hash -260907664, now seen corresponding path program 52 times [2021-06-05 05:13:03,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:03,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505818402] [2021-06-05 05:13:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:03,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:03,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505818402] [2021-06-05 05:13:03,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505818402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:03,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69764746] [2021-06-05 05:13:03,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:03,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:03,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:03,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:03,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:03,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:03,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:03,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:03,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:03,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:03,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69764746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:03,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:03,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:13:03,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122946781] [2021-06-05 05:13:03,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:03,829 INFO L87 Difference]: Start difference. First operand 1352 states and 4644 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:04,723 INFO L93 Difference]: Finished difference Result 2456 states and 8262 transitions. [2021-06-05 05:13:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:13:04,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:04,727 INFO L225 Difference]: With dead ends: 2456 [2021-06-05 05:13:04,727 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 05:13:04,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 696.3ms TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:13:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 05:13:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1353. [2021-06-05 05:13:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.44008875739645) internal successors, (4651), 1352 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4651 transitions. [2021-06-05 05:13:04,747 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4651 transitions. Word has length 24 [2021-06-05 05:13:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:04,747 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4651 transitions. [2021-06-05 05:13:04,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4651 transitions. [2021-06-05 05:13:04,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:04,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:04,749 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:04,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:04,949 INFO L430 AbstractCegarLoop]: === Iteration 88 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:04,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1760921938, now seen corresponding path program 1 times [2021-06-05 05:13:04,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:04,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518526525] [2021-06-05 05:13:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:05,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518526525] [2021-06-05 05:13:05,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518526525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889376565] [2021-06-05 05:13:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:05,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:05,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:05,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:05,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:05,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:05,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:05,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:13:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:05,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889376565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:05,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:05,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340944696] [2021-06-05 05:13:05,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:05,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:05,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:05,293 INFO L87 Difference]: Start difference. First operand 1353 states and 4651 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:08,064 INFO L93 Difference]: Finished difference Result 3805 states and 13021 transitions. [2021-06-05 05:13:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:13:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:08,070 INFO L225 Difference]: With dead ends: 3805 [2021-06-05 05:13:08,070 INFO L226 Difference]: Without dead ends: 3786 [2021-06-05 05:13:08,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2081.0ms TimeCoverageRelationStatistics Valid=761, Invalid=4351, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:13:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2021-06-05 05:13:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 1388. [2021-06-05 05:13:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.4491708723864454) internal successors, (4784), 1387 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4784 transitions. [2021-06-05 05:13:08,101 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4784 transitions. Word has length 24 [2021-06-05 05:13:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:08,101 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 4784 transitions. [2021-06-05 05:13:08,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:08,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4784 transitions. [2021-06-05 05:13:08,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:08,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:08,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:08,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:08,317 INFO L430 AbstractCegarLoop]: === Iteration 89 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:08,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:08,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1251406074, now seen corresponding path program 2 times [2021-06-05 05:13:08,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:08,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061778588] [2021-06-05 05:13:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:08,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:08,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061778588] [2021-06-05 05:13:08,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061778588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:08,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646763262] [2021-06-05 05:13:08,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:08,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:08,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:08,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:08,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:08,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:08,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:08,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:08,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:13:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:08,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646763262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:08,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:08,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:13:08,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162292012] [2021-06-05 05:13:08,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:08,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:08,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:08,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:08,718 INFO L87 Difference]: Start difference. First operand 1388 states and 4784 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:10,103 INFO L93 Difference]: Finished difference Result 2357 states and 8002 transitions. [2021-06-05 05:13:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:13:10,104 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:10,107 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 05:13:10,107 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 05:13:10,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1087.6ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:13:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 05:13:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1398. [2021-06-05 05:13:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.45025053686471) internal successors, (4820), 1397 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4820 transitions. [2021-06-05 05:13:10,139 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4820 transitions. Word has length 24 [2021-06-05 05:13:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:10,139 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4820 transitions. [2021-06-05 05:13:10,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4820 transitions. [2021-06-05 05:13:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:10,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:10,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:10,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 05:13:10,341 INFO L430 AbstractCegarLoop]: === Iteration 90 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:10,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1041868694, now seen corresponding path program 3 times [2021-06-05 05:13:10,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:10,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627370110] [2021-06-05 05:13:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:10,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:10,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627370110] [2021-06-05 05:13:10,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627370110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:10,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379834612] [2021-06-05 05:13:10,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:10,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:10,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:10,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:10,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:10,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:10,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:10,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:13:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:10,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379834612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:10,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:10,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:10,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917342997] [2021-06-05 05:13:10,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:10,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:10,722 INFO L87 Difference]: Start difference. First operand 1398 states and 4820 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:12,077 INFO L93 Difference]: Finished difference Result 2538 states and 8518 transitions. [2021-06-05 05:13:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:13:12,078 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:12,081 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 05:13:12,082 INFO L226 Difference]: Without dead ends: 2509 [2021-06-05 05:13:12,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1017.1ms TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:13:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-05 05:13:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1408. [2021-06-05 05:13:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.4534470504619756) internal successors, (4859), 1407 states have internal predecessors, (4859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4859 transitions. [2021-06-05 05:13:12,103 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4859 transitions. Word has length 24 [2021-06-05 05:13:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:12,103 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4859 transitions. [2021-06-05 05:13:12,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4859 transitions. [2021-06-05 05:13:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:12,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:12,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:12,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 05:13:12,306 INFO L430 AbstractCegarLoop]: === Iteration 91 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1524426856, now seen corresponding path program 4 times [2021-06-05 05:13:12,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:12,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681296150] [2021-06-05 05:13:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:12,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:12,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681296150] [2021-06-05 05:13:12,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681296150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:12,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620911704] [2021-06-05 05:13:12,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:12,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:12,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:12,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:12,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:12,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:12,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:12,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:12,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:13:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:12,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620911704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:12,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:12,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:12,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974553092] [2021-06-05 05:13:12,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:12,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:12,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:12,670 INFO L87 Difference]: Start difference. First operand 1408 states and 4859 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:13,903 INFO L93 Difference]: Finished difference Result 2473 states and 8324 transitions. [2021-06-05 05:13:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:13:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:13,907 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 05:13:13,907 INFO L226 Difference]: Without dead ends: 2444 [2021-06-05 05:13:13,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 963.6ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:13:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-05 05:13:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1402. [2021-06-05 05:13:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.457530335474661) internal successors, (4844), 1401 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4844 transitions. [2021-06-05 05:13:13,928 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4844 transitions. Word has length 24 [2021-06-05 05:13:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:13,928 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4844 transitions. [2021-06-05 05:13:13,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4844 transitions. [2021-06-05 05:13:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:13,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:13,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:14,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:14,131 INFO L430 AbstractCegarLoop]: === Iteration 92 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1742390580, now seen corresponding path program 5 times [2021-06-05 05:13:14,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:14,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813809569] [2021-06-05 05:13:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:14,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:14,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813809569] [2021-06-05 05:13:14,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813809569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590003991] [2021-06-05 05:13:14,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:14,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:14,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:14,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:14,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:14,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:14,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:14,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:14,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:14,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590003991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:14,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:14,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:13:14,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737378448] [2021-06-05 05:13:14,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:14,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:14,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:14,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:14,434 INFO L87 Difference]: Start difference. First operand 1402 states and 4844 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:15,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:15,120 INFO L93 Difference]: Finished difference Result 2298 states and 7819 transitions. [2021-06-05 05:13:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:13:15,121 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:15,124 INFO L225 Difference]: With dead ends: 2298 [2021-06-05 05:13:15,124 INFO L226 Difference]: Without dead ends: 2289 [2021-06-05 05:13:15,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 522.9ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:13:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-06-05 05:13:15,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1415. [2021-06-05 05:13:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 3.454031117397454) internal successors, (4884), 1414 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 4884 transitions. [2021-06-05 05:13:15,143 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 4884 transitions. Word has length 24 [2021-06-05 05:13:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:15,143 INFO L482 AbstractCegarLoop]: Abstraction has 1415 states and 4884 transitions. [2021-06-05 05:13:15,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 4884 transitions. [2021-06-05 05:13:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:15,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:15,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:15,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:15,345 INFO L430 AbstractCegarLoop]: === Iteration 93 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2065976758, now seen corresponding path program 6 times [2021-06-05 05:13:15,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:15,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940996806] [2021-06-05 05:13:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:15,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:15,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940996806] [2021-06-05 05:13:15,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940996806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:15,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019762117] [2021-06-05 05:13:15,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:15,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:15,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:15,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:15,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:15,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:15,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:15,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 05:13:15,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:15,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:15,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:15,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-05 05:13:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:15,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019762117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:15,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:15,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:13:15,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744887290] [2021-06-05 05:13:15,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:15,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:15,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:15,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:15,787 INFO L87 Difference]: Start difference. First operand 1415 states and 4884 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:17,402 INFO L93 Difference]: Finished difference Result 2286 states and 7759 transitions. [2021-06-05 05:13:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:13:17,403 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:17,406 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 05:13:17,406 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 05:13:17,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1411.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2322, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:13:17,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 05:13:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1418. [2021-06-05 05:13:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.455892731122089) internal successors, (4897), 1417 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4897 transitions. [2021-06-05 05:13:17,425 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4897 transitions. Word has length 24 [2021-06-05 05:13:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:17,425 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4897 transitions. [2021-06-05 05:13:17,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4897 transitions. [2021-06-05 05:13:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:17,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:17,427 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:17,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:17,627 INFO L430 AbstractCegarLoop]: === Iteration 94 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash -543246416, now seen corresponding path program 7 times [2021-06-05 05:13:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:17,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911354333] [2021-06-05 05:13:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:17,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:17,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911354333] [2021-06-05 05:13:17,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911354333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:17,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460128968] [2021-06-05 05:13:17,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:17,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:17,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:17,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:17,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:17,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:17,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:17,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460128968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:17,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:17,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:13:17,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337206889] [2021-06-05 05:13:17,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:13:17,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:17,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:13:17,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:17,926 INFO L87 Difference]: Start difference. First operand 1418 states and 4897 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:18,602 INFO L93 Difference]: Finished difference Result 2241 states and 7629 transitions. [2021-06-05 05:13:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:13:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:18,605 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 05:13:18,605 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 05:13:18,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 546.4ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:13:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 05:13:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1410. [2021-06-05 05:13:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.4570617459190918) internal successors, (4871), 1409 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4871 transitions. [2021-06-05 05:13:18,625 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4871 transitions. Word has length 24 [2021-06-05 05:13:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:18,625 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4871 transitions. [2021-06-05 05:13:18,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4871 transitions. [2021-06-05 05:13:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:18,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:18,627 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:18,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 05:13:18,827 INFO L430 AbstractCegarLoop]: === Iteration 95 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1059751936, now seen corresponding path program 53 times [2021-06-05 05:13:18,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:18,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610470934] [2021-06-05 05:13:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:18,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:18,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610470934] [2021-06-05 05:13:18,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610470934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:18,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547560946] [2021-06-05 05:13:18,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:19,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:19,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:19,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:19,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:19,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:19,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:19,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:13:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:19,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547560946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:19,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:19,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:19,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289867659] [2021-06-05 05:13:19,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:19,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:19,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:19,170 INFO L87 Difference]: Start difference. First operand 1410 states and 4871 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:20,151 INFO L93 Difference]: Finished difference Result 2280 states and 7676 transitions. [2021-06-05 05:13:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:13:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:20,155 INFO L225 Difference]: With dead ends: 2280 [2021-06-05 05:13:20,156 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 05:13:20,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 643.7ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:13:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 05:13:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1412. [2021-06-05 05:13:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.4564138908575477) internal successors, (4877), 1411 states have internal predecessors, (4877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4877 transitions. [2021-06-05 05:13:20,174 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4877 transitions. Word has length 24 [2021-06-05 05:13:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:20,174 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4877 transitions. [2021-06-05 05:13:20,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4877 transitions. [2021-06-05 05:13:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:20,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:20,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:20,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 05:13:20,377 INFO L430 AbstractCegarLoop]: === Iteration 96 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash -448330122, now seen corresponding path program 54 times [2021-06-05 05:13:20,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:20,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591162350] [2021-06-05 05:13:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:20,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:20,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591162350] [2021-06-05 05:13:20,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591162350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:20,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13208541] [2021-06-05 05:13:20,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:20,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:20,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:13:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:20,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:20,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:20,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:20,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 05:13:20,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:20,844 INFO L628 ElimStorePlain]: treesize reduction 29, result has 52.5 percent of original size [2021-06-05 05:13:20,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:20,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 05:13:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:20,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13208541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:20,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:20,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:13:20,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513561896] [2021-06-05 05:13:20,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:13:20,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:13:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:20,904 INFO L87 Difference]: Start difference. First operand 1412 states and 4877 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:21,905 INFO L93 Difference]: Finished difference Result 2222 states and 7429 transitions. [2021-06-05 05:13:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:13:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:21,909 INFO L225 Difference]: With dead ends: 2222 [2021-06-05 05:13:21,909 INFO L226 Difference]: Without dead ends: 2190 [2021-06-05 05:13:21,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:13:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-05 05:13:21,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1424. [2021-06-05 05:13:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.456078706957133) internal successors, (4918), 1423 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4918 transitions. [2021-06-05 05:13:21,929 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4918 transitions. Word has length 24 [2021-06-05 05:13:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:21,929 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 4918 transitions. [2021-06-05 05:13:21,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4918 transitions. [2021-06-05 05:13:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:21,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:21,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:22,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:22,145 INFO L430 AbstractCegarLoop]: === Iteration 97 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:22,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1487913390, now seen corresponding path program 55 times [2021-06-05 05:13:22,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:22,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978808230] [2021-06-05 05:13:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:22,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:22,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978808230] [2021-06-05 05:13:22,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978808230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:22,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549104162] [2021-06-05 05:13:22,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:22,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:22,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:22,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:22,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:22,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:13:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:22,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549104162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:22,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:22,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:22,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670222329] [2021-06-05 05:13:22,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:22,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:22,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:22,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:22,468 INFO L87 Difference]: Start difference. First operand 1424 states and 4918 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:23,386 INFO L93 Difference]: Finished difference Result 2213 states and 7447 transitions. [2021-06-05 05:13:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:13:23,386 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:23,389 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 05:13:23,389 INFO L226 Difference]: Without dead ends: 2191 [2021-06-05 05:13:23,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:13:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-06-05 05:13:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1426. [2021-06-05 05:13:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.4596491228070176) internal successors, (4930), 1425 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4930 transitions. [2021-06-05 05:13:23,409 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4930 transitions. Word has length 24 [2021-06-05 05:13:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:23,409 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4930 transitions. [2021-06-05 05:13:23,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4930 transitions. [2021-06-05 05:13:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:23,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:23,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:23,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 05:13:23,612 INFO L430 AbstractCegarLoop]: === Iteration 98 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:23,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1311371958, now seen corresponding path program 56 times [2021-06-05 05:13:23,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:23,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438407068] [2021-06-05 05:13:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:23,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:23,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438407068] [2021-06-05 05:13:23,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438407068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:23,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705338779] [2021-06-05 05:13:23,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:23,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:23,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:23,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:23,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:23,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:23,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:13:23,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:23,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:23,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:23,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:13:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:23,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705338779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:23,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:23,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:13:23,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587995268] [2021-06-05 05:13:23,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:23,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:23,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:23,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:23,970 INFO L87 Difference]: Start difference. First operand 1426 states and 4930 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:24,788 INFO L93 Difference]: Finished difference Result 2144 states and 7220 transitions. [2021-06-05 05:13:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:13:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:24,792 INFO L225 Difference]: With dead ends: 2144 [2021-06-05 05:13:24,792 INFO L226 Difference]: Without dead ends: 2134 [2021-06-05 05:13:24,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 677.0ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:13:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-05 05:13:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1432. [2021-06-05 05:13:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.4556254367575123) internal successors, (4945), 1431 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4945 transitions. [2021-06-05 05:13:24,811 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4945 transitions. Word has length 24 [2021-06-05 05:13:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:24,811 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 4945 transitions. [2021-06-05 05:13:24,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4945 transitions. [2021-06-05 05:13:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:24,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:24,813 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:25,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 05:13:25,016 INFO L430 AbstractCegarLoop]: === Iteration 99 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash 477633518, now seen corresponding path program 57 times [2021-06-05 05:13:25,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:25,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558884427] [2021-06-05 05:13:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:25,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:25,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558884427] [2021-06-05 05:13:25,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558884427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:25,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910756065] [2021-06-05 05:13:25,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:25,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:13:25,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:25,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:25,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:25,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:25,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:25,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:13:25,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:25,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:25,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:25,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:46 [2021-06-05 05:13:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:25,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910756065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:25,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:25,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:13:25,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917520584] [2021-06-05 05:13:25,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:25,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:25,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:25,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:25,483 INFO L87 Difference]: Start difference. First operand 1432 states and 4945 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:26,982 INFO L93 Difference]: Finished difference Result 2174 states and 7260 transitions. [2021-06-05 05:13:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:13:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:26,985 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 05:13:26,985 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 05:13:26,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1220.3ms TimeCoverageRelationStatistics Valid=384, Invalid=2268, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:13:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 05:13:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1456. [2021-06-05 05:13:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.454982817869416) internal successors, (5027), 1455 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5027 transitions. [2021-06-05 05:13:27,012 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5027 transitions. Word has length 24 [2021-06-05 05:13:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:27,012 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5027 transitions. [2021-06-05 05:13:27,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5027 transitions. [2021-06-05 05:13:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:27,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:27,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:27,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 05:13:27,230 INFO L430 AbstractCegarLoop]: === Iteration 100 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1259467318, now seen corresponding path program 58 times [2021-06-05 05:13:27,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:27,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688586112] [2021-06-05 05:13:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:27,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:27,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688586112] [2021-06-05 05:13:27,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688586112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:27,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757503794] [2021-06-05 05:13:27,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:27,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:27,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:27,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:27,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:27,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:27,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:27,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:27,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:27,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:27,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757503794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:27,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:27,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:13:27,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202660718] [2021-06-05 05:13:27,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:13:27,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:27,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:13:27,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:27,538 INFO L87 Difference]: Start difference. First operand 1456 states and 5027 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:28,227 INFO L93 Difference]: Finished difference Result 2091 states and 7062 transitions. [2021-06-05 05:13:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:13:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:28,231 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 05:13:28,231 INFO L226 Difference]: Without dead ends: 2080 [2021-06-05 05:13:28,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 483.9ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:13:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-06-05 05:13:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1453. [2021-06-05 05:13:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.4579889807162534) internal successors, (5021), 1452 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5021 transitions. [2021-06-05 05:13:28,251 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5021 transitions. Word has length 24 [2021-06-05 05:13:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:28,251 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 5021 transitions. [2021-06-05 05:13:28,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5021 transitions. [2021-06-05 05:13:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:28,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:28,253 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:28,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:28,454 INFO L430 AbstractCegarLoop]: === Iteration 101 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:28,454 INFO L82 PathProgramCache]: Analyzing trace with hash -291281526, now seen corresponding path program 8 times [2021-06-05 05:13:28,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:28,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632178330] [2021-06-05 05:13:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:28,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632178330] [2021-06-05 05:13:28,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632178330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764979375] [2021-06-05 05:13:28,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:28,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:28,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:28,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:28,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:28,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:28,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:28,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:13:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:28,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764979375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:28,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:28,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:13:28,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559608238] [2021-06-05 05:13:28,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:28,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:28,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:28,869 INFO L87 Difference]: Start difference. First operand 1453 states and 5021 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:29,720 INFO L93 Difference]: Finished difference Result 2199 states and 7401 transitions. [2021-06-05 05:13:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:13:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:29,723 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 05:13:29,723 INFO L226 Difference]: Without dead ends: 2190 [2021-06-05 05:13:29,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 612.3ms TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:13:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-05 05:13:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1453. [2021-06-05 05:13:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.4579889807162534) internal successors, (5021), 1452 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5021 transitions. [2021-06-05 05:13:29,741 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5021 transitions. Word has length 24 [2021-06-05 05:13:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:29,741 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 5021 transitions. [2021-06-05 05:13:29,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5021 transitions. [2021-06-05 05:13:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:29,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:29,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:29,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:29,943 INFO L430 AbstractCegarLoop]: === Iteration 102 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:29,944 INFO L82 PathProgramCache]: Analyzing trace with hash -500818906, now seen corresponding path program 9 times [2021-06-05 05:13:29,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:29,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573194306] [2021-06-05 05:13:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:30,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573194306] [2021-06-05 05:13:30,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573194306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658211277] [2021-06-05 05:13:30,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:30,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:30,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:30,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:30,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:30,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:30,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:30,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:30,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:13:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:30,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658211277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:30,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:30,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:30,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504875996] [2021-06-05 05:13:30,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:30,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:30,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:30,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:30,278 INFO L87 Difference]: Start difference. First operand 1453 states and 5021 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:31,378 INFO L93 Difference]: Finished difference Result 2243 states and 7546 transitions. [2021-06-05 05:13:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:13:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:31,381 INFO L225 Difference]: With dead ends: 2243 [2021-06-05 05:13:31,381 INFO L226 Difference]: Without dead ends: 2224 [2021-06-05 05:13:31,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 716.8ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:13:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-06-05 05:13:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1462. [2021-06-05 05:13:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.45927446954141) internal successors, (5054), 1461 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5054 transitions. [2021-06-05 05:13:31,399 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5054 transitions. Word has length 24 [2021-06-05 05:13:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:31,399 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 5054 transitions. [2021-06-05 05:13:31,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5054 transitions. [2021-06-05 05:13:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:31,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:31,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:31,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:31,601 INFO L430 AbstractCegarLoop]: === Iteration 103 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:31,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1227852840, now seen corresponding path program 10 times [2021-06-05 05:13:31,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:31,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904262543] [2021-06-05 05:13:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:31,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:31,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904262543] [2021-06-05 05:13:31,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904262543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:31,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645393661] [2021-06-05 05:13:31,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:31,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:31,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:31,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:31,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:31,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:31,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:31,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:13:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:31,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645393661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:31,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:31,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:31,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191838431] [2021-06-05 05:13:31,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:31,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:31,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:31,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:31,932 INFO L87 Difference]: Start difference. First operand 1462 states and 5054 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:32,876 INFO L93 Difference]: Finished difference Result 2195 states and 7404 transitions. [2021-06-05 05:13:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:13:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:32,879 INFO L225 Difference]: With dead ends: 2195 [2021-06-05 05:13:32,879 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 05:13:32,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:13:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 05:13:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1460. [2021-06-05 05:13:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.4619602467443453) internal successors, (5051), 1459 states have internal predecessors, (5051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5051 transitions. [2021-06-05 05:13:32,897 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5051 transitions. Word has length 24 [2021-06-05 05:13:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:32,897 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5051 transitions. [2021-06-05 05:13:32,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5051 transitions. [2021-06-05 05:13:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:32,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:32,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:33,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:13:33,099 INFO L430 AbstractCegarLoop]: === Iteration 104 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:33,100 INFO L82 PathProgramCache]: Analyzing trace with hash 199702980, now seen corresponding path program 11 times [2021-06-05 05:13:33,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:33,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756043378] [2021-06-05 05:13:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:33,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:33,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756043378] [2021-06-05 05:13:33,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756043378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:33,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915356058] [2021-06-05 05:13:33,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:33,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:33,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:33,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:33,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:33,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:33,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:33,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:33,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:33,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915356058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:33,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:33,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:13:33,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755814449] [2021-06-05 05:13:33,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:33,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:33,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:33,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:33,403 INFO L87 Difference]: Start difference. First operand 1460 states and 5051 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:34,030 INFO L93 Difference]: Finished difference Result 2165 states and 7322 transitions. [2021-06-05 05:13:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:13:34,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:34,033 INFO L225 Difference]: With dead ends: 2165 [2021-06-05 05:13:34,034 INFO L226 Difference]: Without dead ends: 2156 [2021-06-05 05:13:34,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:13:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-05 05:13:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1469. [2021-06-05 05:13:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.459809264305177) internal successors, (5079), 1468 states have internal predecessors, (5079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 5079 transitions. [2021-06-05 05:13:34,053 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 5079 transitions. Word has length 24 [2021-06-05 05:13:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:34,053 INFO L482 AbstractCegarLoop]: Abstraction has 1469 states and 5079 transitions. [2021-06-05 05:13:34,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 5079 transitions. [2021-06-05 05:13:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:34,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:34,055 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:34,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 05:13:34,255 INFO L430 AbstractCegarLoop]: === Iteration 105 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash 523289158, now seen corresponding path program 12 times [2021-06-05 05:13:34,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:34,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041752326] [2021-06-05 05:13:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:34,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:34,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041752326] [2021-06-05 05:13:34,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041752326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:34,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47556122] [2021-06-05 05:13:34,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:34,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:34,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:34,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:13:34,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:34,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:34,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:34,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 05:13:34,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:34,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:34,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:34,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-05 05:13:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:34,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47556122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:34,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:34,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:13:34,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521020164] [2021-06-05 05:13:34,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:34,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:34,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:34,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:34,712 INFO L87 Difference]: Start difference. First operand 1469 states and 5079 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:35,671 INFO L93 Difference]: Finished difference Result 2142 states and 7233 transitions. [2021-06-05 05:13:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:13:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:35,676 INFO L225 Difference]: With dead ends: 2142 [2021-06-05 05:13:35,676 INFO L226 Difference]: Without dead ends: 2133 [2021-06-05 05:13:35,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 779.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:13:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-06-05 05:13:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1481. [2021-06-05 05:13:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.4594594594594597) internal successors, (5120), 1480 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 5120 transitions. [2021-06-05 05:13:35,697 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 5120 transitions. Word has length 24 [2021-06-05 05:13:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:35,697 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 5120 transitions. [2021-06-05 05:13:35,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 5120 transitions. [2021-06-05 05:13:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:35,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:35,699 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:35,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 05:13:35,899 INFO L430 AbstractCegarLoop]: === Iteration 106 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:35,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2085934016, now seen corresponding path program 13 times [2021-06-05 05:13:35,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:35,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123914877] [2021-06-05 05:13:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:36,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:36,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123914877] [2021-06-05 05:13:36,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123914877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:36,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544622595] [2021-06-05 05:13:36,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:36,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:36,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:36,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:36,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:36,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:36,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:36,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:36,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544622595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:36,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:36,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:13:36,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040278040] [2021-06-05 05:13:36,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:13:36,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:36,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:13:36,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:13:36,200 INFO L87 Difference]: Start difference. First operand 1481 states and 5120 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:36,923 INFO L93 Difference]: Finished difference Result 2094 states and 7096 transitions. [2021-06-05 05:13:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:13:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:36,927 INFO L225 Difference]: With dead ends: 2094 [2021-06-05 05:13:36,927 INFO L226 Difference]: Without dead ends: 2083 [2021-06-05 05:13:36,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:13:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-05 05:13:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1473. [2021-06-05 05:13:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 3.4619565217391304) internal successors, (5096), 1472 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 5096 transitions. [2021-06-05 05:13:36,947 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 5096 transitions. Word has length 24 [2021-06-05 05:13:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:36,947 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 5096 transitions. [2021-06-05 05:13:36,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 5096 transitions. [2021-06-05 05:13:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:36,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:36,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:37,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:37,165 INFO L430 AbstractCegarLoop]: === Iteration 107 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash 721304348, now seen corresponding path program 59 times [2021-06-05 05:13:37,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:37,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212287583] [2021-06-05 05:13:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:37,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:37,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212287583] [2021-06-05 05:13:37,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212287583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:37,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916272894] [2021-06-05 05:13:37,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:37,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:13:37,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:37,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:37,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:37,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:37,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:37,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:37,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:37,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:13:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:37,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916272894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:37,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:37,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:37,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081584899] [2021-06-05 05:13:37,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:37,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:37,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:37,544 INFO L87 Difference]: Start difference. First operand 1473 states and 5096 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:39,302 INFO L93 Difference]: Finished difference Result 2359 states and 7859 transitions. [2021-06-05 05:13:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:13:39,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:39,306 INFO L225 Difference]: With dead ends: 2359 [2021-06-05 05:13:39,306 INFO L226 Difference]: Without dead ends: 2317 [2021-06-05 05:13:39,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1296.4ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:13:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-05 05:13:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1490. [2021-06-05 05:13:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.455339153794493) internal successors, (5145), 1489 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5145 transitions. [2021-06-05 05:13:39,326 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5145 transitions. Word has length 24 [2021-06-05 05:13:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:39,326 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 5145 transitions. [2021-06-05 05:13:39,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5145 transitions. [2021-06-05 05:13:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:39,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:39,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:39,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:39,528 INFO L430 AbstractCegarLoop]: === Iteration 108 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:39,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1985601830, now seen corresponding path program 60 times [2021-06-05 05:13:39,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:39,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999378288] [2021-06-05 05:13:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:39,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:39,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999378288] [2021-06-05 05:13:39,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999378288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:39,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365562621] [2021-06-05 05:13:39,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:39,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:13:39,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:39,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:39,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:39,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:39,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:39,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 05:13:39,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:13:39,941 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-05 05:13:39,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:39,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 05:13:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:40,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365562621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:40,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:40,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:13:40,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358777063] [2021-06-05 05:13:40,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:13:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:40,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:13:40,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:13:40,002 INFO L87 Difference]: Start difference. First operand 1490 states and 5145 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:41,230 INFO L93 Difference]: Finished difference Result 2233 states and 7485 transitions. [2021-06-05 05:13:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:13:41,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:41,233 INFO L225 Difference]: With dead ends: 2233 [2021-06-05 05:13:41,233 INFO L226 Difference]: Without dead ends: 2187 [2021-06-05 05:13:41,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 896.0ms TimeCoverageRelationStatistics Valid=237, Invalid=1743, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:13:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-05 05:13:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1495. [2021-06-05 05:13:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 3.4558232931726907) internal successors, (5163), 1494 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 5163 transitions. [2021-06-05 05:13:41,252 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 5163 transitions. Word has length 24 [2021-06-05 05:13:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:41,252 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 5163 transitions. [2021-06-05 05:13:41,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 5163 transitions. [2021-06-05 05:13:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:41,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:41,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:41,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 05:13:41,454 INFO L430 AbstractCegarLoop]: === Iteration 109 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:41,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1809060398, now seen corresponding path program 61 times [2021-06-05 05:13:41,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:41,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562442285] [2021-06-05 05:13:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:41,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:41,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562442285] [2021-06-05 05:13:41,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562442285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:41,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740874959] [2021-06-05 05:13:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:41,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:41,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:41,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:41,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:41,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:41,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740874959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:41,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:41,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:13:41,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592625651] [2021-06-05 05:13:41,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:41,794 INFO L87 Difference]: Start difference. First operand 1495 states and 5163 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:42,790 INFO L93 Difference]: Finished difference Result 2155 states and 7270 transitions. [2021-06-05 05:13:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:13:42,791 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:42,794 INFO L225 Difference]: With dead ends: 2155 [2021-06-05 05:13:42,794 INFO L226 Difference]: Without dead ends: 2125 [2021-06-05 05:13:42,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 832.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:13:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-06-05 05:13:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1497. [2021-06-05 05:13:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.4558823529411766) internal successors, (5170), 1496 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5170 transitions. [2021-06-05 05:13:42,812 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5170 transitions. Word has length 24 [2021-06-05 05:13:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:42,812 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 5170 transitions. [2021-06-05 05:13:42,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5170 transitions. [2021-06-05 05:13:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:42,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:42,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:43,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 05:13:43,014 INFO L430 AbstractCegarLoop]: === Iteration 110 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:43,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:43,014 INFO L82 PathProgramCache]: Analyzing trace with hash 975321958, now seen corresponding path program 62 times [2021-06-05 05:13:43,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:43,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409283337] [2021-06-05 05:13:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:43,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:43,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409283337] [2021-06-05 05:13:43,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409283337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:43,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706517873] [2021-06-05 05:13:43,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:43,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:43,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:43,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:43,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:43,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:13:43,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:43,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:43,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:43,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:13:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:43,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706517873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:43,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:43,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:13:43,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133359514] [2021-06-05 05:13:43,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:43,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:43,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:43,407 INFO L87 Difference]: Start difference. First operand 1497 states and 5170 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:44,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:44,653 INFO L93 Difference]: Finished difference Result 2128 states and 7174 transitions. [2021-06-05 05:13:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:13:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:44,657 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 05:13:44,657 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 05:13:44,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 937.4ms TimeCoverageRelationStatistics Valid=297, Invalid=2055, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:13:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 05:13:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1499. [2021-06-05 05:13:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.4539385847797064) internal successors, (5174), 1498 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5174 transitions. [2021-06-05 05:13:44,675 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5174 transitions. Word has length 24 [2021-06-05 05:13:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:44,676 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5174 transitions. [2021-06-05 05:13:44,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5174 transitions. [2021-06-05 05:13:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:44,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:44,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:44,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:44,878 INFO L430 AbstractCegarLoop]: === Iteration 111 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:44,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:44,878 INFO L82 PathProgramCache]: Analyzing trace with hash -846298030, now seen corresponding path program 14 times [2021-06-05 05:13:44,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:44,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494903048] [2021-06-05 05:13:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:45,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:45,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494903048] [2021-06-05 05:13:45,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494903048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:45,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534594861] [2021-06-05 05:13:45,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:45,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:45,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:45,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:45,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:45,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:45,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:45,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:13:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:45,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534594861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:45,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:45,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:13:45,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645049575] [2021-06-05 05:13:45,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:45,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:45,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:45,290 INFO L87 Difference]: Start difference. First operand 1499 states and 5174 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:46,693 INFO L93 Difference]: Finished difference Result 2335 states and 7758 transitions. [2021-06-05 05:13:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:13:46,694 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:46,697 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 05:13:46,697 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 05:13:46,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1112.2ms TimeCoverageRelationStatistics Valid=381, Invalid=2589, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:13:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 05:13:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1503. [2021-06-05 05:13:46,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.454727030625832) internal successors, (5189), 1502 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5189 transitions. [2021-06-05 05:13:46,717 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5189 transitions. Word has length 24 [2021-06-05 05:13:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:46,717 INFO L482 AbstractCegarLoop]: Abstraction has 1503 states and 5189 transitions. [2021-06-05 05:13:46,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5189 transitions. [2021-06-05 05:13:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:46,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:46,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:46,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 05:13:46,920 INFO L430 AbstractCegarLoop]: === Iteration 112 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash 882373716, now seen corresponding path program 15 times [2021-06-05 05:13:46,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:46,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391572902] [2021-06-05 05:13:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:47,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:47,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391572902] [2021-06-05 05:13:47,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391572902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:47,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985591041] [2021-06-05 05:13:47,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:47,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:13:47,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:47,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:13:47,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:47,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:47,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:13:47,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:47,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:47,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:47,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:13:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:47,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985591041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:47,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:47,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:13:47,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520108510] [2021-06-05 05:13:47,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:47,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:47,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:47,361 INFO L87 Difference]: Start difference. First operand 1503 states and 5189 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:49,659 INFO L93 Difference]: Finished difference Result 2316 states and 7730 transitions. [2021-06-05 05:13:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:13:49,659 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:49,662 INFO L225 Difference]: With dead ends: 2316 [2021-06-05 05:13:49,662 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 05:13:49,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1882.7ms TimeCoverageRelationStatistics Valid=572, Invalid=3588, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:13:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 05:13:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1507. [2021-06-05 05:13:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.455511288180611) internal successors, (5204), 1506 states have internal predecessors, (5204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5204 transitions. [2021-06-05 05:13:49,682 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5204 transitions. Word has length 24 [2021-06-05 05:13:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:49,682 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 5204 transitions. [2021-06-05 05:13:49,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5204 transitions. [2021-06-05 05:13:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:49,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:49,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:49,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:49,884 INFO L430 AbstractCegarLoop]: === Iteration 113 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:49,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash -145776144, now seen corresponding path program 16 times [2021-06-05 05:13:49,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:49,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056928250] [2021-06-05 05:13:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:50,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:50,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056928250] [2021-06-05 05:13:50,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056928250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:50,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107768775] [2021-06-05 05:13:50,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:50,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:50,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:50,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:50,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:50,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:50,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:50,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:50,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107768775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:50,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:50,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:13:50,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269706667] [2021-06-05 05:13:50,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:50,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:50,185 INFO L87 Difference]: Start difference. First operand 1507 states and 5204 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:51,283 INFO L93 Difference]: Finished difference Result 2152 states and 7265 transitions. [2021-06-05 05:13:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:13:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:51,286 INFO L225 Difference]: With dead ends: 2152 [2021-06-05 05:13:51,286 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 05:13:51,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 861.8ms TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:13:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 05:13:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1510. [2021-06-05 05:13:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.453943008614977) internal successors, (5212), 1509 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5212 transitions. [2021-06-05 05:13:51,306 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5212 transitions. Word has length 24 [2021-06-05 05:13:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:51,306 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 5212 transitions. [2021-06-05 05:13:51,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5212 transitions. [2021-06-05 05:13:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:51,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:51,308 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:51,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:51,509 INFO L430 AbstractCegarLoop]: === Iteration 114 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 177810034, now seen corresponding path program 17 times [2021-06-05 05:13:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:51,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884238256] [2021-06-05 05:13:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:51,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884238256] [2021-06-05 05:13:51,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884238256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011545656] [2021-06-05 05:13:51,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:51,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:13:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:51,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:51,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:51,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:51,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:51,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:51,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:51,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011545656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:51,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:51,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:13:51,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701158698] [2021-06-05 05:13:51,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:51,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:51,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:51,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:51,860 INFO L87 Difference]: Start difference. First operand 1510 states and 5212 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:52,798 INFO L93 Difference]: Finished difference Result 2129 states and 7196 transitions. [2021-06-05 05:13:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:13:52,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:52,802 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 05:13:52,802 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 05:13:52,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:13:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 05:13:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1507. [2021-06-05 05:13:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.454183266932271) internal successors, (5202), 1506 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5202 transitions. [2021-06-05 05:13:52,820 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5202 transitions. Word has length 24 [2021-06-05 05:13:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:52,820 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 5202 transitions. [2021-06-05 05:13:52,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5202 transitions. [2021-06-05 05:13:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:52,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:52,822 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:53,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:53,023 INFO L430 AbstractCegarLoop]: === Iteration 115 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:53,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1468982144, now seen corresponding path program 63 times [2021-06-05 05:13:53,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:53,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299787179] [2021-06-05 05:13:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:53,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:53,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299787179] [2021-06-05 05:13:53,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299787179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:53,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056798817] [2021-06-05 05:13:53,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:53,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:13:53,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:53,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:53,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:13:53,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:53,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:53,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:53,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:13:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:53,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056798817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:53,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:53,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:53,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942476407] [2021-06-05 05:13:53,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:53,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:53,378 INFO L87 Difference]: Start difference. First operand 1507 states and 5202 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:55,527 INFO L93 Difference]: Finished difference Result 2395 states and 7988 transitions. [2021-06-05 05:13:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:13:55,527 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:55,531 INFO L225 Difference]: With dead ends: 2395 [2021-06-05 05:13:55,531 INFO L226 Difference]: Without dead ends: 2353 [2021-06-05 05:13:55,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1683.0ms TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:13:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-05 05:13:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1512. [2021-06-05 05:13:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.452680344142952) internal successors, (5217), 1511 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5217 transitions. [2021-06-05 05:13:55,552 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5217 transitions. Word has length 24 [2021-06-05 05:13:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:55,552 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5217 transitions. [2021-06-05 05:13:55,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5217 transitions. [2021-06-05 05:13:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:55,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:55,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:55,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 05:13:55,773 INFO L430 AbstractCegarLoop]: === Iteration 116 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:55,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1686407030, now seen corresponding path program 64 times [2021-06-05 05:13:55,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:55,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000877141] [2021-06-05 05:13:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:55,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000877141] [2021-06-05 05:13:55,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000877141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166428948] [2021-06-05 05:13:55,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:55,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:13:55,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:56,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:13:56,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:56,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:56,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:56,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:13:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166428948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:56,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:56,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:13:56,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141611923] [2021-06-05 05:13:56,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:56,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:56,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:56,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:56,082 INFO L87 Difference]: Start difference. First operand 1512 states and 5217 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:57,537 INFO L93 Difference]: Finished difference Result 2231 states and 7499 transitions. [2021-06-05 05:13:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:13:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:57,541 INFO L225 Difference]: With dead ends: 2231 [2021-06-05 05:13:57,541 INFO L226 Difference]: Without dead ends: 2201 [2021-06-05 05:13:57,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1246.8ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:13:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-06-05 05:13:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1514. [2021-06-05 05:13:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.4527428949107732) internal successors, (5224), 1513 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 5224 transitions. [2021-06-05 05:13:57,559 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 5224 transitions. Word has length 24 [2021-06-05 05:13:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:57,559 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 5224 transitions. [2021-06-05 05:13:57,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 5224 transitions. [2021-06-05 05:13:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:57,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:57,561 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:57,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 05:13:57,762 INFO L430 AbstractCegarLoop]: === Iteration 117 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:13:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash 852668590, now seen corresponding path program 65 times [2021-06-05 05:13:57,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:57,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255265728] [2021-06-05 05:13:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:57,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:57,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255265728] [2021-06-05 05:13:57,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255265728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:57,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795416556] [2021-06-05 05:13:57,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:57,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:13:57,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:57,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:57,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:58,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:13:58,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:58,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:13:58,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 05:13:58,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:58,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:58,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:58,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2021-06-05 05:13:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:58,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795416556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:58,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:58,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:13:58,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899385531] [2021-06-05 05:13:58,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:13:58,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:58,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:13:58,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:13:58,111 INFO L87 Difference]: Start difference. First operand 1514 states and 5224 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:59,966 INFO L93 Difference]: Finished difference Result 2184 states and 7332 transitions. [2021-06-05 05:13:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:13:59,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:13:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:59,969 INFO L225 Difference]: With dead ends: 2184 [2021-06-05 05:13:59,970 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 05:13:59,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1511.3ms TimeCoverageRelationStatistics Valid=513, Invalid=3777, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:13:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 05:13:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1509. [2021-06-05 05:13:59,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.453580901856764) internal successors, (5208), 1508 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5208 transitions. [2021-06-05 05:13:59,995 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5208 transitions. Word has length 24 [2021-06-05 05:13:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:59,995 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5208 transitions. [2021-06-05 05:13:59,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5208 transitions. [2021-06-05 05:13:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:13:59,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:59,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:00,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:00,197 INFO L430 AbstractCegarLoop]: === Iteration 118 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:00,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:00,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2111150986, now seen corresponding path program 18 times [2021-06-05 05:14:00,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:00,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742916171] [2021-06-05 05:14:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:00,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:00,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742916171] [2021-06-05 05:14:00,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742916171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:00,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106668735] [2021-06-05 05:14:00,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:00,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:14:00,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:00,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:00,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:00,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:00,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:00,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:00,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:00,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:14:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:00,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106668735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:00,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:00,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:14:00,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380417894] [2021-06-05 05:14:00,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:00,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:00,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:00,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:00,597 INFO L87 Difference]: Start difference. First operand 1509 states and 5208 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:02,653 INFO L93 Difference]: Finished difference Result 2330 states and 7756 transitions. [2021-06-05 05:14:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:14:02,653 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:02,656 INFO L225 Difference]: With dead ends: 2330 [2021-06-05 05:14:02,656 INFO L226 Difference]: Without dead ends: 2272 [2021-06-05 05:14:02,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1577.8ms TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:14:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-05 05:14:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1512. [2021-06-05 05:14:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.4533421575115817) internal successors, (5218), 1511 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5218 transitions. [2021-06-05 05:14:02,675 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5218 transitions. Word has length 24 [2021-06-05 05:14:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:02,675 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5218 transitions. [2021-06-05 05:14:02,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5218 transitions. [2021-06-05 05:14:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:02,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:02,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:02,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:02,878 INFO L430 AbstractCegarLoop]: === Iteration 119 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1083001126, now seen corresponding path program 19 times [2021-06-05 05:14:02,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:02,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139350492] [2021-06-05 05:14:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:03,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139350492] [2021-06-05 05:14:03,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139350492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069246368] [2021-06-05 05:14:03,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:03,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:03,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:03,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:03,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:03,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:03,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:03,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069246368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:03,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:03,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:03,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930007855] [2021-06-05 05:14:03,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:03,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:03,174 INFO L87 Difference]: Start difference. First operand 1512 states and 5218 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:04,631 INFO L93 Difference]: Finished difference Result 2195 states and 7393 transitions. [2021-06-05 05:14:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:14:04,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:04,635 INFO L225 Difference]: With dead ends: 2195 [2021-06-05 05:14:04,635 INFO L226 Difference]: Without dead ends: 2169 [2021-06-05 05:14:04,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1151.3ms TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:14:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-05 05:14:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1515. [2021-06-05 05:14:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.451783355350066) internal successors, (5226), 1514 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 5226 transitions. [2021-06-05 05:14:04,655 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 5226 transitions. Word has length 24 [2021-06-05 05:14:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:04,655 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 5226 transitions. [2021-06-05 05:14:04,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 5226 transitions. [2021-06-05 05:14:04,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:04,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:04,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:04,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:04,857 INFO L430 AbstractCegarLoop]: === Iteration 120 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:04,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1406587304, now seen corresponding path program 20 times [2021-06-05 05:14:04,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:04,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672916370] [2021-06-05 05:14:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:04,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:04,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672916370] [2021-06-05 05:14:04,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672916370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:04,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550300284] [2021-06-05 05:14:04,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:05,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:05,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:05,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:05,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:05,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:14:05,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:05,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:05,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:05,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:14:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:05,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550300284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:05,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:05,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:14:05,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261505131] [2021-06-05 05:14:05,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:05,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:05,227 INFO L87 Difference]: Start difference. First operand 1515 states and 5226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:07,315 INFO L93 Difference]: Finished difference Result 2274 states and 7562 transitions. [2021-06-05 05:14:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:14:07,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:07,319 INFO L225 Difference]: With dead ends: 2274 [2021-06-05 05:14:07,319 INFO L226 Difference]: Without dead ends: 2243 [2021-06-05 05:14:07,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 1688.3ms TimeCoverageRelationStatistics Valid=590, Invalid=3570, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:14:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2021-06-05 05:14:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 1527. [2021-06-05 05:14:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.450851900393185) internal successors, (5266), 1526 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5266 transitions. [2021-06-05 05:14:07,340 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5266 transitions. Word has length 24 [2021-06-05 05:14:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:07,340 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 5266 transitions. [2021-06-05 05:14:07,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5266 transitions. [2021-06-05 05:14:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:07,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:07,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:07,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:07,543 INFO L430 AbstractCegarLoop]: === Iteration 121 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1202635870, now seen corresponding path program 21 times [2021-06-05 05:14:07,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:07,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911306541] [2021-06-05 05:14:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:07,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:07,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911306541] [2021-06-05 05:14:07,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911306541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:07,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091061337] [2021-06-05 05:14:07,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:07,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:14:07,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:07,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:07,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:07,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:07,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:07,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:07,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:07,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091061337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:07,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:07,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:14:07,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313117553] [2021-06-05 05:14:07,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:14:07,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:07,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:14:07,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:14:07,866 INFO L87 Difference]: Start difference. First operand 1527 states and 5266 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:09,117 INFO L93 Difference]: Finished difference Result 2109 states and 7137 transitions. [2021-06-05 05:14:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:14:09,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:09,120 INFO L225 Difference]: With dead ends: 2109 [2021-06-05 05:14:09,120 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 05:14:09,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1030.1ms TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:14:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 05:14:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1518. [2021-06-05 05:14:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.4535266974291363) internal successors, (5239), 1517 states have internal predecessors, (5239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5239 transitions. [2021-06-05 05:14:09,138 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5239 transitions. Word has length 24 [2021-06-05 05:14:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:09,139 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5239 transitions. [2021-06-05 05:14:09,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5239 transitions. [2021-06-05 05:14:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:09,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:09,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:09,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:09,341 INFO L430 AbstractCegarLoop]: === Iteration 122 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:09,341 INFO L82 PathProgramCache]: Analyzing trace with hash -743658084, now seen corresponding path program 66 times [2021-06-05 05:14:09,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:09,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006492880] [2021-06-05 05:14:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:09,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:09,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006492880] [2021-06-05 05:14:09,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006492880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:09,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177607950] [2021-06-05 05:14:09,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:09,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:14:09,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:09,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:09,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:09,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:09,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:14:09,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:09,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:09,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:09,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:14:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:09,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177607950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:09,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:09,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:14:09,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393641527] [2021-06-05 05:14:09,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:09,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:09,689 INFO L87 Difference]: Start difference. First operand 1518 states and 5239 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:12,079 INFO L93 Difference]: Finished difference Result 2778 states and 9114 transitions. [2021-06-05 05:14:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:14:12,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:12,083 INFO L225 Difference]: With dead ends: 2778 [2021-06-05 05:14:12,083 INFO L226 Difference]: Without dead ends: 2741 [2021-06-05 05:14:12,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 1947.7ms TimeCoverageRelationStatistics Valid=924, Invalid=6048, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:14:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-06-05 05:14:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 1535. [2021-06-05 05:14:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.4615384615384617) internal successors, (5310), 1534 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5310 transitions. [2021-06-05 05:14:12,105 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5310 transitions. Word has length 24 [2021-06-05 05:14:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:12,105 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5310 transitions. [2021-06-05 05:14:12,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5310 transitions. [2021-06-05 05:14:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:12,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:12,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:12,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:12,313 INFO L430 AbstractCegarLoop]: === Iteration 123 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:12,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1760448038, now seen corresponding path program 67 times [2021-06-05 05:14:12,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:12,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278578820] [2021-06-05 05:14:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:12,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:12,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278578820] [2021-06-05 05:14:12,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278578820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:12,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974030360] [2021-06-05 05:14:12,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:12,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:12,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:12,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:12,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:12,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:12,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:12,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974030360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:12,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:12,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:12,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284323873] [2021-06-05 05:14:12,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:12,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:12,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:12,638 INFO L87 Difference]: Start difference. First operand 1535 states and 5310 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:14,689 INFO L93 Difference]: Finished difference Result 2830 states and 9291 transitions. [2021-06-05 05:14:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:14:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:14,697 INFO L225 Difference]: With dead ends: 2830 [2021-06-05 05:14:14,697 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 05:14:14,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 1741.8ms TimeCoverageRelationStatistics Valid=868, Invalid=5294, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:14:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 05:14:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1554. [2021-06-05 05:14:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 3.4745653573728266) internal successors, (5396), 1553 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 5396 transitions. [2021-06-05 05:14:14,721 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 5396 transitions. Word has length 24 [2021-06-05 05:14:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:14,721 INFO L482 AbstractCegarLoop]: Abstraction has 1554 states and 5396 transitions. [2021-06-05 05:14:14,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 5396 transitions. [2021-06-05 05:14:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:14,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:14,723 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:14,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 05:14:14,923 INFO L430 AbstractCegarLoop]: === Iteration 124 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:14,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1493814354, now seen corresponding path program 22 times [2021-06-05 05:14:14,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:14,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715852717] [2021-06-05 05:14:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:15,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:15,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715852717] [2021-06-05 05:14:15,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715852717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:15,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461967927] [2021-06-05 05:14:15,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:15,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:15,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:15,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:15,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:15,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:15,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:15,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:15,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461967927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:15,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:15,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:15,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088518987] [2021-06-05 05:14:15,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:15,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:15,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:15,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:15,214 INFO L87 Difference]: Start difference. First operand 1554 states and 5396 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:17,212 INFO L93 Difference]: Finished difference Result 2881 states and 9430 transitions. [2021-06-05 05:14:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:14:17,212 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:17,216 INFO L225 Difference]: With dead ends: 2881 [2021-06-05 05:14:17,216 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 05:14:17,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1705.2ms TimeCoverageRelationStatistics Valid=911, Invalid=5095, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:14:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 05:14:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1582. [2021-06-05 05:14:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.4927261227071473) internal successors, (5522), 1581 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5522 transitions. [2021-06-05 05:14:17,240 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5522 transitions. Word has length 24 [2021-06-05 05:14:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:17,240 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5522 transitions. [2021-06-05 05:14:17,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5522 transitions. [2021-06-05 05:14:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:17,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:17,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:17,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 05:14:17,442 INFO L430 AbstractCegarLoop]: === Iteration 125 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:17,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1817400532, now seen corresponding path program 23 times [2021-06-05 05:14:17,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:17,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611087840] [2021-06-05 05:14:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:17,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:17,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611087840] [2021-06-05 05:14:17,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611087840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:17,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610386791] [2021-06-05 05:14:17,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:17,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:17,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:17,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:17,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:17,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:17,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:17,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:17,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:17,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610386791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:17,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:17,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:17,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750015420] [2021-06-05 05:14:17,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:17,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:17,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:17,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:17,743 INFO L87 Difference]: Start difference. First operand 1582 states and 5522 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:19,713 INFO L93 Difference]: Finished difference Result 2726 states and 9045 transitions. [2021-06-05 05:14:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:14:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:19,717 INFO L225 Difference]: With dead ends: 2726 [2021-06-05 05:14:19,717 INFO L226 Difference]: Without dead ends: 2706 [2021-06-05 05:14:19,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1630.6ms TimeCoverageRelationStatistics Valid=828, Invalid=4722, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:14:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-06-05 05:14:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1576. [2021-06-05 05:14:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.493333333333333) internal successors, (5502), 1575 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5502 transitions. [2021-06-05 05:14:19,740 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5502 transitions. Word has length 24 [2021-06-05 05:14:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:19,740 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5502 transitions. [2021-06-05 05:14:19,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:19,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5502 transitions. [2021-06-05 05:14:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:19,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:19,742 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:19,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:19,955 INFO L430 AbstractCegarLoop]: === Iteration 126 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:19,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1940644096, now seen corresponding path program 68 times [2021-06-05 05:14:19,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:19,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137275992] [2021-06-05 05:14:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:20,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:20,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137275992] [2021-06-05 05:14:20,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137275992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:20,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832860117] [2021-06-05 05:14:20,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:20,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:20,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:20,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:20,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:20,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:14:20,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:20,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:20,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:20,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:14:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:20,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832860117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:20,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:20,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:14:20,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278585902] [2021-06-05 05:14:20,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:20,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:20,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:20,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:20,302 INFO L87 Difference]: Start difference. First operand 1576 states and 5502 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:22,959 INFO L93 Difference]: Finished difference Result 2803 states and 9390 transitions. [2021-06-05 05:14:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 05:14:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:22,963 INFO L225 Difference]: With dead ends: 2803 [2021-06-05 05:14:22,963 INFO L226 Difference]: Without dead ends: 2781 [2021-06-05 05:14:22,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 2279.8ms TimeCoverageRelationStatistics Valid=988, Invalid=6322, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:14:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-06-05 05:14:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 1592. [2021-06-05 05:14:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 3.508485229415462) internal successors, (5582), 1591 states have internal predecessors, (5582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 5582 transitions. [2021-06-05 05:14:22,987 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 5582 transitions. Word has length 24 [2021-06-05 05:14:22,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:22,987 INFO L482 AbstractCegarLoop]: Abstraction has 1592 states and 5582 transitions. [2021-06-05 05:14:22,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 5582 transitions. [2021-06-05 05:14:22,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:22,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:22,990 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:23,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:23,205 INFO L430 AbstractCegarLoop]: === Iteration 127 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2145562230, now seen corresponding path program 24 times [2021-06-05 05:14:23,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:23,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556343569] [2021-06-05 05:14:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:23,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:23,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556343569] [2021-06-05 05:14:23,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556343569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:23,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459119016] [2021-06-05 05:14:23,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:23,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:23,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:23,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:23,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:23,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:14:23,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:23,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:23,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:23,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 05:14:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:23,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459119016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:23,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:23,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:14:23,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111140706] [2021-06-05 05:14:23,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:23,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:23,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:23,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:23,579 INFO L87 Difference]: Start difference. First operand 1592 states and 5582 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:26,241 INFO L93 Difference]: Finished difference Result 2820 states and 9359 transitions. [2021-06-05 05:14:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:14:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:26,245 INFO L225 Difference]: With dead ends: 2820 [2021-06-05 05:14:26,246 INFO L226 Difference]: Without dead ends: 2800 [2021-06-05 05:14:26,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2682 ImplicationChecksByTransitivity, 2366.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=6222, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:14:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-06-05 05:14:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1593. [2021-06-05 05:14:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.5069095477386933) internal successors, (5583), 1592 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5583 transitions. [2021-06-05 05:14:26,271 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5583 transitions. Word has length 24 [2021-06-05 05:14:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:26,271 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5583 transitions. [2021-06-05 05:14:26,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5583 transitions. [2021-06-05 05:14:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:26,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:26,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:26,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 05:14:26,474 INFO L430 AbstractCegarLoop]: === Iteration 128 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:26,475 INFO L82 PathProgramCache]: Analyzing trace with hash -459818108, now seen corresponding path program 25 times [2021-06-05 05:14:26,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:26,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365944242] [2021-06-05 05:14:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:26,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:26,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365944242] [2021-06-05 05:14:26,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365944242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:26,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765078182] [2021-06-05 05:14:26,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:26,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:26,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:26,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:26,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:26,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:26,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:14:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:26,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765078182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:26,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:26,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:14:26,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690202439] [2021-06-05 05:14:26,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:14:26,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:14:26,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:14:26,832 INFO L87 Difference]: Start difference. First operand 1593 states and 5583 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:28,850 INFO L93 Difference]: Finished difference Result 2662 states and 8908 transitions. [2021-06-05 05:14:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:14:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:28,855 INFO L225 Difference]: With dead ends: 2662 [2021-06-05 05:14:28,855 INFO L226 Difference]: Without dead ends: 2629 [2021-06-05 05:14:28,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1635.0ms TimeCoverageRelationStatistics Valid=738, Invalid=4092, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:14:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-05 05:14:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1589. [2021-06-05 05:14:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.5025188916876573) internal successors, (5562), 1588 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5562 transitions. [2021-06-05 05:14:28,888 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5562 transitions. Word has length 24 [2021-06-05 05:14:28,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:28,888 INFO L482 AbstractCegarLoop]: Abstraction has 1589 states and 5562 transitions. [2021-06-05 05:14:28,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5562 transitions. [2021-06-05 05:14:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:28,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:28,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:29,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:29,093 INFO L430 AbstractCegarLoop]: === Iteration 129 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1985018250, now seen corresponding path program 26 times [2021-06-05 05:14:29,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:29,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170947171] [2021-06-05 05:14:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:29,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170947171] [2021-06-05 05:14:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170947171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603500041] [2021-06-05 05:14:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:29,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:29,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:29,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:29,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:29,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:29,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:29,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:29,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:29,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:29,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:14:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:29,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603500041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:29,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:29,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:14:29,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387204379] [2021-06-05 05:14:29,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:29,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:29,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:29,513 INFO L87 Difference]: Start difference. First operand 1589 states and 5562 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:31,845 INFO L93 Difference]: Finished difference Result 3367 states and 11408 transitions. [2021-06-05 05:14:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:14:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:31,851 INFO L225 Difference]: With dead ends: 3367 [2021-06-05 05:14:31,851 INFO L226 Difference]: Without dead ends: 3341 [2021-06-05 05:14:31,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 1801.8ms TimeCoverageRelationStatistics Valid=538, Invalid=4018, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:14:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-06-05 05:14:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 1591. [2021-06-05 05:14:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.5018867924528303) internal successors, (5568), 1590 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5568 transitions. [2021-06-05 05:14:31,880 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5568 transitions. Word has length 24 [2021-06-05 05:14:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:31,880 INFO L482 AbstractCegarLoop]: Abstraction has 1591 states and 5568 transitions. [2021-06-05 05:14:31,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5568 transitions. [2021-06-05 05:14:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:31,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:31,882 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:32,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:32,086 INFO L430 AbstractCegarLoop]: === Iteration 130 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1800433182, now seen corresponding path program 27 times [2021-06-05 05:14:32,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:32,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009248864] [2021-06-05 05:14:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:32,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:32,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009248864] [2021-06-05 05:14:32,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009248864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:32,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027417729] [2021-06-05 05:14:32,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:32,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:32,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:32,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:32,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:32,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:14:32,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:32,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:32,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:32,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:14:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:32,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027417729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:32,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:32,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:14:32,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535382861] [2021-06-05 05:14:32,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:32,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:32,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:32,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:32,480 INFO L87 Difference]: Start difference. First operand 1591 states and 5568 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:35,150 INFO L93 Difference]: Finished difference Result 2710 states and 9124 transitions. [2021-06-05 05:14:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:14:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:35,154 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 05:14:35,155 INFO L226 Difference]: Without dead ends: 2683 [2021-06-05 05:14:35,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2043.8ms TimeCoverageRelationStatistics Valid=744, Invalid=4368, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:14:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2021-06-05 05:14:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1600. [2021-06-05 05:14:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.50281425891182) internal successors, (5601), 1599 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5601 transitions. [2021-06-05 05:14:35,182 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5601 transitions. Word has length 24 [2021-06-05 05:14:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:35,182 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5601 transitions. [2021-06-05 05:14:35,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5601 transitions. [2021-06-05 05:14:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:35,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:35,185 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:35,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 05:14:35,385 INFO L430 AbstractCegarLoop]: === Iteration 131 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1590895802, now seen corresponding path program 28 times [2021-06-05 05:14:35,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:35,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981154670] [2021-06-05 05:14:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:35,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:35,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981154670] [2021-06-05 05:14:35,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981154670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:35,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973351191] [2021-06-05 05:14:35,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:35,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:35,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:35,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:35,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:35,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:35,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:35,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:35,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:14:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:35,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973351191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:35,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:35,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:35,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275772676] [2021-06-05 05:14:35,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:35,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:35,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:35,744 INFO L87 Difference]: Start difference. First operand 1600 states and 5601 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:37,348 INFO L93 Difference]: Finished difference Result 2564 states and 8676 transitions. [2021-06-05 05:14:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:14:37,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:37,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:37,352 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 05:14:37,352 INFO L226 Difference]: Without dead ends: 2535 [2021-06-05 05:14:37,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1293.9ms TimeCoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:14:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-06-05 05:14:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1605. [2021-06-05 05:14:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.501870324189526) internal successors, (5617), 1604 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5617 transitions. [2021-06-05 05:14:37,375 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5617 transitions. Word has length 24 [2021-06-05 05:14:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:37,376 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5617 transitions. [2021-06-05 05:14:37,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5617 transitions. [2021-06-05 05:14:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:37,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:37,378 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:37,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 05:14:37,591 INFO L430 AbstractCegarLoop]: === Iteration 132 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash -975399748, now seen corresponding path program 29 times [2021-06-05 05:14:37,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:37,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144829849] [2021-06-05 05:14:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:37,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:37,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144829849] [2021-06-05 05:14:37,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144829849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:37,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653214028] [2021-06-05 05:14:37,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:37,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:37,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:37,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:37,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:37,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:37,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:37,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:37,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:14:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:37,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653214028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:37,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:37,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:37,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550509694] [2021-06-05 05:14:37,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:37,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:37,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:37,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:37,966 INFO L87 Difference]: Start difference. First operand 1605 states and 5617 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:39,370 INFO L93 Difference]: Finished difference Result 2491 states and 8452 transitions. [2021-06-05 05:14:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:14:39,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:39,374 INFO L225 Difference]: With dead ends: 2491 [2021-06-05 05:14:39,374 INFO L226 Difference]: Without dead ends: 2462 [2021-06-05 05:14:39,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1221.4ms TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:14:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-05 05:14:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1598. [2021-06-05 05:14:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 3.504696305572949) internal successors, (5597), 1597 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 5597 transitions. [2021-06-05 05:14:39,396 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 5597 transitions. Word has length 24 [2021-06-05 05:14:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:39,396 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 5597 transitions. [2021-06-05 05:14:39,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 5597 transitions. [2021-06-05 05:14:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:39,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:39,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:39,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:39,598 INFO L430 AbstractCegarLoop]: === Iteration 133 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2003549608, now seen corresponding path program 30 times [2021-06-05 05:14:39,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:39,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200822235] [2021-06-05 05:14:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:39,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:39,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200822235] [2021-06-05 05:14:39,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200822235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:39,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983269462] [2021-06-05 05:14:39,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:39,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:39,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:39,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:39,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 05:14:39,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:39,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:39,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:39,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:36 [2021-06-05 05:14:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:39,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983269462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:39,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:39,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:14:39,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387554571] [2021-06-05 05:14:39,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:39,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:39,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:39,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:39,999 INFO L87 Difference]: Start difference. First operand 1598 states and 5597 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:41,561 INFO L93 Difference]: Finished difference Result 2374 states and 8085 transitions. [2021-06-05 05:14:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:14:41,561 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:41,564 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 05:14:41,564 INFO L226 Difference]: Without dead ends: 2357 [2021-06-05 05:14:41,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1369.4ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:14:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-06-05 05:14:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1611. [2021-06-05 05:14:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.5012422360248445) internal successors, (5637), 1610 states have internal predecessors, (5637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5637 transitions. [2021-06-05 05:14:41,592 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5637 transitions. Word has length 24 [2021-06-05 05:14:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:41,592 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5637 transitions. [2021-06-05 05:14:41,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5637 transitions. [2021-06-05 05:14:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:41,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:41,594 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:41,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 05:14:41,809 INFO L430 AbstractCegarLoop]: === Iteration 134 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1679963430, now seen corresponding path program 31 times [2021-06-05 05:14:41,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:41,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040030154] [2021-06-05 05:14:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:41,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:41,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040030154] [2021-06-05 05:14:41,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040030154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:41,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616447412] [2021-06-05 05:14:41,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:41,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:42,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:42,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:42,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:42,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:42,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:42,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616447412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:42,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:42,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:42,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159993021] [2021-06-05 05:14:42,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:42,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:42,126 INFO L87 Difference]: Start difference. First operand 1611 states and 5637 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:43,113 INFO L93 Difference]: Finished difference Result 2307 states and 7914 transitions. [2021-06-05 05:14:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:14:43,113 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:43,117 INFO L225 Difference]: With dead ends: 2307 [2021-06-05 05:14:43,117 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 05:14:43,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 816.3ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:14:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 05:14:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1596. [2021-06-05 05:14:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 3.5040752351097177) internal successors, (5589), 1595 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 5589 transitions. [2021-06-05 05:14:43,139 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 5589 transitions. Word has length 24 [2021-06-05 05:14:43,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:43,139 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 5589 transitions. [2021-06-05 05:14:43,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:43,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 5589 transitions. [2021-06-05 05:14:43,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:43,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:43,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:43,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:43,341 INFO L430 AbstractCegarLoop]: === Iteration 135 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:43,342 INFO L82 PathProgramCache]: Analyzing trace with hash 772236998, now seen corresponding path program 32 times [2021-06-05 05:14:43,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:43,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641875140] [2021-06-05 05:14:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:43,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:43,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641875140] [2021-06-05 05:14:43,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641875140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:43,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421243909] [2021-06-05 05:14:43,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:43,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:43,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:43,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:43,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:43,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:43,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:43,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:43,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:43,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:43,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:14:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:43,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421243909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:43,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:43,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:14:43,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188916881] [2021-06-05 05:14:43,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:43,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:43,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:43,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:43,749 INFO L87 Difference]: Start difference. First operand 1596 states and 5589 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:46,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:46,145 INFO L93 Difference]: Finished difference Result 3315 states and 11270 transitions. [2021-06-05 05:14:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:14:46,146 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:46,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:46,151 INFO L225 Difference]: With dead ends: 3315 [2021-06-05 05:14:46,151 INFO L226 Difference]: Without dead ends: 3296 [2021-06-05 05:14:46,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1992.3ms TimeCoverageRelationStatistics Valid=585, Invalid=4107, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:14:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-05 05:14:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 1596. [2021-06-05 05:14:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 3.5040752351097177) internal successors, (5589), 1595 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 5589 transitions. [2021-06-05 05:14:46,177 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 5589 transitions. Word has length 24 [2021-06-05 05:14:46,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:46,177 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 5589 transitions. [2021-06-05 05:14:46,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 5589 transitions. [2021-06-05 05:14:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:46,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:46,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:46,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:46,379 INFO L430 AbstractCegarLoop]: === Iteration 136 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:46,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:46,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1068711792, now seen corresponding path program 33 times [2021-06-05 05:14:46,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:46,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443027253] [2021-06-05 05:14:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:46,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:46,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443027253] [2021-06-05 05:14:46,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443027253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:46,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313500601] [2021-06-05 05:14:46,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:46,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:46,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:46,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:46,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:46,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:46,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:14:46,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:46,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:46,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:46,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:14:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:46,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313500601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:46,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:46,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:14:46,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353511686] [2021-06-05 05:14:46,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:46,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:46,801 INFO L87 Difference]: Start difference. First operand 1596 states and 5589 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:49,520 INFO L93 Difference]: Finished difference Result 2689 states and 9043 transitions. [2021-06-05 05:14:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:14:49,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:49,524 INFO L225 Difference]: With dead ends: 2689 [2021-06-05 05:14:49,524 INFO L226 Difference]: Without dead ends: 2662 [2021-06-05 05:14:49,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2213.0ms TimeCoverageRelationStatistics Valid=686, Invalid=4284, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:14:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-06-05 05:14:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1601. [2021-06-05 05:14:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.503125) internal successors, (5605), 1600 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5605 transitions. [2021-06-05 05:14:49,548 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5605 transitions. Word has length 24 [2021-06-05 05:14:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:49,548 INFO L482 AbstractCegarLoop]: Abstraction has 1601 states and 5605 transitions. [2021-06-05 05:14:49,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5605 transitions. [2021-06-05 05:14:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:49,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:49,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:49,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 05:14:49,751 INFO L430 AbstractCegarLoop]: === Iteration 137 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:49,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:49,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1073663896, now seen corresponding path program 34 times [2021-06-05 05:14:49,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:49,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045356594] [2021-06-05 05:14:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:49,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:49,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045356594] [2021-06-05 05:14:49,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045356594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:49,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582780482] [2021-06-05 05:14:49,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:49,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:14:49,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:49,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:50,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:50,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:50,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:50,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:50,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:14:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:50,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582780482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:50,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:50,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:50,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321280410] [2021-06-05 05:14:50,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:50,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:50,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:50,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:50,109 INFO L87 Difference]: Start difference. First operand 1601 states and 5605 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:51,749 INFO L93 Difference]: Finished difference Result 2578 states and 8710 transitions. [2021-06-05 05:14:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:14:51,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:51,753 INFO L225 Difference]: With dead ends: 2578 [2021-06-05 05:14:51,753 INFO L226 Difference]: Without dead ends: 2558 [2021-06-05 05:14:51,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1273.9ms TimeCoverageRelationStatistics Valid=368, Invalid=2284, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:14:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-06-05 05:14:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 1604. [2021-06-05 05:14:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.5015595757953837) internal successors, (5613), 1603 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 5613 transitions. [2021-06-05 05:14:51,780 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 5613 transitions. Word has length 24 [2021-06-05 05:14:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:51,780 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 5613 transitions. [2021-06-05 05:14:51,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 5613 transitions. [2021-06-05 05:14:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:51,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:51,782 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:51,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 05:14:51,993 INFO L430 AbstractCegarLoop]: === Iteration 138 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1285059888, now seen corresponding path program 35 times [2021-06-05 05:14:51,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:51,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935737096] [2021-06-05 05:14:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:52,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:52,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935737096] [2021-06-05 05:14:52,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935737096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:52,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045519078] [2021-06-05 05:14:52,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:52,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:14:52,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:52,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:52,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:52,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:52,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:52,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:52,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:52,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:14:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:52,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045519078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:52,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:52,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:52,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511698519] [2021-06-05 05:14:52,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:52,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:52,363 INFO L87 Difference]: Start difference. First operand 1604 states and 5613 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:53,727 INFO L93 Difference]: Finished difference Result 2511 states and 8501 transitions. [2021-06-05 05:14:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:14:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:53,732 INFO L225 Difference]: With dead ends: 2511 [2021-06-05 05:14:53,732 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 05:14:53,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1176.7ms TimeCoverageRelationStatistics Valid=363, Invalid=2187, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:14:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 05:14:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1600. [2021-06-05 05:14:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.5053158223889933) internal successors, (5605), 1599 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5605 transitions. [2021-06-05 05:14:53,755 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5605 transitions. Word has length 24 [2021-06-05 05:14:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:53,756 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5605 transitions. [2021-06-05 05:14:53,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5605 transitions. [2021-06-05 05:14:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:53,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:53,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:53,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:53,958 INFO L430 AbstractCegarLoop]: === Iteration 139 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:53,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1461601320, now seen corresponding path program 36 times [2021-06-05 05:14:53,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:53,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113036859] [2021-06-05 05:14:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:54,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:54,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113036859] [2021-06-05 05:14:54,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113036859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:54,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713532163] [2021-06-05 05:14:54,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:54,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:14:54,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:54,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:54,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:54,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:54,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:54,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:54,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:54,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:54,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713532163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:54,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:54,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:54,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517061243] [2021-06-05 05:14:54,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:54,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:54,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:54,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:54,288 INFO L87 Difference]: Start difference. First operand 1600 states and 5605 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:55,663 INFO L93 Difference]: Finished difference Result 2345 states and 8015 transitions. [2021-06-05 05:14:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:14:55,663 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:55,667 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 05:14:55,667 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 05:14:55,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1152.4ms TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:14:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 05:14:55,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1608. [2021-06-05 05:14:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.5003111387678905) internal successors, (5625), 1607 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5625 transitions. [2021-06-05 05:14:55,689 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5625 transitions. Word has length 24 [2021-06-05 05:14:55,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:55,689 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5625 transitions. [2021-06-05 05:14:55,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5625 transitions. [2021-06-05 05:14:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:55,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:55,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:55,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 05:14:55,892 INFO L430 AbstractCegarLoop]: === Iteration 140 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:55,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1999627536, now seen corresponding path program 37 times [2021-06-05 05:14:55,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:55,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792970713] [2021-06-05 05:14:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:56,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:56,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792970713] [2021-06-05 05:14:56,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792970713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:56,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586287043] [2021-06-05 05:14:56,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:56,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:56,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:56,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:14:56,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:56,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:56,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:56,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:14:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:56,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586287043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:56,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:56,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:14:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870273291] [2021-06-05 05:14:56,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:14:56,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:56,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:14:56,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:14:56,229 INFO L87 Difference]: Start difference. First operand 1608 states and 5625 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:57,554 INFO L93 Difference]: Finished difference Result 2356 states and 8045 transitions. [2021-06-05 05:14:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:14:57,554 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:57,558 INFO L225 Difference]: With dead ends: 2356 [2021-06-05 05:14:57,558 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 05:14:57,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1036.8ms TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:14:57,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 05:14:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1603. [2021-06-05 05:14:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.5037453183520597) internal successors, (5613), 1602 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5613 transitions. [2021-06-05 05:14:57,581 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5613 transitions. Word has length 24 [2021-06-05 05:14:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:57,582 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5613 transitions. [2021-06-05 05:14:57,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5613 transitions. [2021-06-05 05:14:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:57,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:57,584 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:57,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 05:14:57,797 INFO L430 AbstractCegarLoop]: === Iteration 141 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2121589456, now seen corresponding path program 38 times [2021-06-05 05:14:57,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:57,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865674990] [2021-06-05 05:14:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:57,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:57,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865674990] [2021-06-05 05:14:57,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865674990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:57,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528706544] [2021-06-05 05:14:57,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:57,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:14:57,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:57,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:14:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:58,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:14:58,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:14:58,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:58,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:58,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:58,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:58,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:14:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:58,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528706544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:58,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:58,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:14:58,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955204159] [2021-06-05 05:14:58,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:14:58,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:14:58,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:14:58,229 INFO L87 Difference]: Start difference. First operand 1603 states and 5613 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:14:59,217 INFO L93 Difference]: Finished difference Result 2139 states and 7300 transitions. [2021-06-05 05:14:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:14:59,217 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:14:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:14:59,220 INFO L225 Difference]: With dead ends: 2139 [2021-06-05 05:14:59,220 INFO L226 Difference]: Without dead ends: 2130 [2021-06-05 05:14:59,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:14:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-06-05 05:14:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1605. [2021-06-05 05:14:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.5037406483790523) internal successors, (5620), 1604 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5620 transitions. [2021-06-05 05:14:59,241 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5620 transitions. Word has length 24 [2021-06-05 05:14:59,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:14:59,241 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5620 transitions. [2021-06-05 05:14:59,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:14:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5620 transitions. [2021-06-05 05:14:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:14:59,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:14:59,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:14:59,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 05:14:59,443 INFO L430 AbstractCegarLoop]: === Iteration 142 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:14:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:14:59,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1912052076, now seen corresponding path program 39 times [2021-06-05 05:14:59,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:14:59,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863734857] [2021-06-05 05:14:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:14:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:14:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:59,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:14:59,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863734857] [2021-06-05 05:14:59,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863734857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:59,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874376063] [2021-06-05 05:14:59,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:14:59,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:14:59,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:14:59,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:14:59,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:14:59,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:14:59,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:14:59,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:14:59,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:14:59,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:14:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:14:59,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874376063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:14:59,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:14:59,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:14:59,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474587702] [2021-06-05 05:14:59,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:14:59,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:14:59,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:14:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:14:59,818 INFO L87 Difference]: Start difference. First operand 1605 states and 5620 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:00,938 INFO L93 Difference]: Finished difference Result 2163 states and 7368 transitions. [2021-06-05 05:15:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:00,942 INFO L225 Difference]: With dead ends: 2163 [2021-06-05 05:15:00,942 INFO L226 Difference]: Without dead ends: 2144 [2021-06-05 05:15:00,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 915.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:15:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-05 05:15:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1610. [2021-06-05 05:15:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.5027967681789933) internal successors, (5636), 1609 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5636 transitions. [2021-06-05 05:15:00,962 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5636 transitions. Word has length 24 [2021-06-05 05:15:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:00,962 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5636 transitions. [2021-06-05 05:15:00,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5636 transitions. [2021-06-05 05:15:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:00,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:00,964 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:01,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:01,164 INFO L430 AbstractCegarLoop]: === Iteration 143 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:01,164 INFO L82 PathProgramCache]: Analyzing trace with hash -654243474, now seen corresponding path program 40 times [2021-06-05 05:15:01,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:01,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821475526] [2021-06-05 05:15:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:01,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821475526] [2021-06-05 05:15:01,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821475526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424671203] [2021-06-05 05:15:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:01,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:01,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:01,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:01,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:01,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:01,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:01,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:01,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:15:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:01,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424671203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:01,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:01,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:15:01,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928407381] [2021-06-05 05:15:01,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:01,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:01,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:01,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:01,545 INFO L87 Difference]: Start difference. First operand 1610 states and 5636 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:02,704 INFO L93 Difference]: Finished difference Result 2117 states and 7230 transitions. [2021-06-05 05:15:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:02,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:02,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:02,707 INFO L225 Difference]: With dead ends: 2117 [2021-06-05 05:15:02,707 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 05:15:02,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 907.4ms TimeCoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:15:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 05:15:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1607. [2021-06-05 05:15:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.5043586550435863) internal successors, (5628), 1606 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5628 transitions. [2021-06-05 05:15:02,731 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5628 transitions. Word has length 24 [2021-06-05 05:15:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:02,731 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5628 transitions. [2021-06-05 05:15:02,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5628 transitions. [2021-06-05 05:15:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:02,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:02,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:02,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:02,934 INFO L430 AbstractCegarLoop]: === Iteration 144 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:02,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1682393334, now seen corresponding path program 41 times [2021-06-05 05:15:02,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:02,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864995283] [2021-06-05 05:15:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:03,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:03,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864995283] [2021-06-05 05:15:03,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864995283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:03,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431273831] [2021-06-05 05:15:03,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:03,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:03,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:03,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:03,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:03,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:03,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:03,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:03,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:03,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431273831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:03,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:03,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:03,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597790679] [2021-06-05 05:15:03,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:03,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:03,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:03,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:03,293 INFO L87 Difference]: Start difference. First operand 1607 states and 5628 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:04,190 INFO L93 Difference]: Finished difference Result 2083 states and 7122 transitions. [2021-06-05 05:15:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:15:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:04,193 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 05:15:04,193 INFO L226 Difference]: Without dead ends: 2074 [2021-06-05 05:15:04,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 764.1ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:15:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-06-05 05:15:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1616. [2021-06-05 05:15:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 3.502167182662539) internal successors, (5656), 1615 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5656 transitions. [2021-06-05 05:15:04,213 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5656 transitions. Word has length 24 [2021-06-05 05:15:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:04,214 INFO L482 AbstractCegarLoop]: Abstraction has 1616 states and 5656 transitions. [2021-06-05 05:15:04,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5656 transitions. [2021-06-05 05:15:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:04,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:04,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:04,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 05:15:04,416 INFO L430 AbstractCegarLoop]: === Iteration 145 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1358807156, now seen corresponding path program 42 times [2021-06-05 05:15:04,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:04,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087659322] [2021-06-05 05:15:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:04,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:04,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087659322] [2021-06-05 05:15:04,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087659322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:04,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786660485] [2021-06-05 05:15:04,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:04,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:04,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:15:04,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:04,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:04,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:04,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:04,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 05:15:04,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:04,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:04,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:04,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-05 05:15:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:04,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786660485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:04,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:04,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:15:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535415911] [2021-06-05 05:15:04,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:04,884 INFO L87 Difference]: Start difference. First operand 1616 states and 5656 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:06,256 INFO L93 Difference]: Finished difference Result 2092 states and 7134 transitions. [2021-06-05 05:15:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:15:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:06,260 INFO L225 Difference]: With dead ends: 2092 [2021-06-05 05:15:06,260 INFO L226 Difference]: Without dead ends: 2083 [2021-06-05 05:15:06,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1155.8ms TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:15:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-05 05:15:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1615. [2021-06-05 05:15:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.502478314745973) internal successors, (5653), 1614 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5653 transitions. [2021-06-05 05:15:06,282 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5653 transitions. Word has length 24 [2021-06-05 05:15:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:06,282 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5653 transitions. [2021-06-05 05:15:06,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5653 transitions. [2021-06-05 05:15:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:06,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:06,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:06,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 05:15:06,493 INFO L430 AbstractCegarLoop]: === Iteration 146 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:06,493 INFO L82 PathProgramCache]: Analyzing trace with hash 326936966, now seen corresponding path program 43 times [2021-06-05 05:15:06,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:06,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726967214] [2021-06-05 05:15:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:06,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:06,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726967214] [2021-06-05 05:15:06,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726967214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:06,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779708992] [2021-06-05 05:15:06,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:06,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:06,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:06,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:06,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:06,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:06,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:06,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779708992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:06,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:06,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:15:06,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077004679] [2021-06-05 05:15:06,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:06,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:06,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:06,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:06,915 INFO L87 Difference]: Start difference. First operand 1615 states and 5653 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:07,862 INFO L93 Difference]: Finished difference Result 2032 states and 6957 transitions. [2021-06-05 05:15:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:15:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:07,865 INFO L225 Difference]: With dead ends: 2032 [2021-06-05 05:15:07,865 INFO L226 Difference]: Without dead ends: 2021 [2021-06-05 05:15:07,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 831.0ms TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:15:07,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-05 05:15:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1605. [2021-06-05 05:15:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.5031172069825436) internal successors, (5619), 1604 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5619 transitions. [2021-06-05 05:15:07,886 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5619 transitions. Word has length 24 [2021-06-05 05:15:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:07,886 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5619 transitions. [2021-06-05 05:15:07,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5619 transitions. [2021-06-05 05:15:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:07,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:07,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:08,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:08,089 INFO L430 AbstractCegarLoop]: === Iteration 147 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash 409417856, now seen corresponding path program 44 times [2021-06-05 05:15:08,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:08,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924073679] [2021-06-05 05:15:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:08,249 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 05:15:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:08,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:08,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924073679] [2021-06-05 05:15:08,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924073679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:08,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739161243] [2021-06-05 05:15:08,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:08,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:08,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:08,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:08,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:08,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:08,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:08,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:08,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:08,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:08,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:15:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:08,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739161243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:08,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:08,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:15:08,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640786210] [2021-06-05 05:15:08,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:08,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:08,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:08,634 INFO L87 Difference]: Start difference. First operand 1605 states and 5619 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:09,653 INFO L93 Difference]: Finished difference Result 2169 states and 7374 transitions. [2021-06-05 05:15:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:15:09,654 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:09,657 INFO L225 Difference]: With dead ends: 2169 [2021-06-05 05:15:09,657 INFO L226 Difference]: Without dead ends: 2160 [2021-06-05 05:15:09,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 913.3ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-06-05 05:15:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1607. [2021-06-05 05:15:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.5043586550435863) internal successors, (5628), 1606 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5628 transitions. [2021-06-05 05:15:09,677 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5628 transitions. Word has length 24 [2021-06-05 05:15:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:09,677 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5628 transitions. [2021-06-05 05:15:09,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5628 transitions. [2021-06-05 05:15:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:09,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:09,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:09,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 05:15:09,879 INFO L430 AbstractCegarLoop]: === Iteration 148 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1098664202, now seen corresponding path program 45 times [2021-06-05 05:15:09,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:09,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730792136] [2021-06-05 05:15:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:10,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:10,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730792136] [2021-06-05 05:15:10,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730792136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:10,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844746156] [2021-06-05 05:15:10,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:10,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:10,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:10,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:10,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:10,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:10,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:10,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:10,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:10,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:10,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:10,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:15:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:10,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844746156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:10,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:10,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:15:10,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194373876] [2021-06-05 05:15:10,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:10,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:10,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:10,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:10,292 INFO L87 Difference]: Start difference. First operand 1607 states and 5628 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:11,259 INFO L93 Difference]: Finished difference Result 2173 states and 7379 transitions. [2021-06-05 05:15:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:11,260 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:11,263 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 05:15:11,263 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 05:15:11,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 805.7ms TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:15:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 05:15:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1610. [2021-06-05 05:15:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.5027967681789933) internal successors, (5636), 1609 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5636 transitions. [2021-06-05 05:15:11,283 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5636 transitions. Word has length 24 [2021-06-05 05:15:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:11,283 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5636 transitions. [2021-06-05 05:15:11,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5636 transitions. [2021-06-05 05:15:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:11,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:11,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:11,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:11,485 INFO L430 AbstractCegarLoop]: === Iteration 149 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:11,486 INFO L82 PathProgramCache]: Analyzing trace with hash 837579310, now seen corresponding path program 46 times [2021-06-05 05:15:11,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:11,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216466201] [2021-06-05 05:15:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:11,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:11,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216466201] [2021-06-05 05:15:11,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216466201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:11,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478726450] [2021-06-05 05:15:11,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:11,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:11,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:11,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:11,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:11,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:11,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:11,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:11,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:11,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:15:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:11,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478726450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:11,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:11,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:15:11,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359751172] [2021-06-05 05:15:11,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:11,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:11,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:11,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:11,860 INFO L87 Difference]: Start difference. First operand 1610 states and 5636 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:12,824 INFO L93 Difference]: Finished difference Result 2159 states and 7353 transitions. [2021-06-05 05:15:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:15:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:12,827 INFO L225 Difference]: With dead ends: 2159 [2021-06-05 05:15:12,827 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 05:15:12,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 05:15:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1608. [2021-06-05 05:15:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.5046670815183574) internal successors, (5632), 1607 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5632 transitions. [2021-06-05 05:15:12,855 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5632 transitions. Word has length 24 [2021-06-05 05:15:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:12,855 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5632 transitions. [2021-06-05 05:15:12,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5632 transitions. [2021-06-05 05:15:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:12,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:12,857 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:13,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-06-05 05:15:13,058 INFO L430 AbstractCegarLoop]: === Iteration 150 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:13,058 INFO L82 PathProgramCache]: Analyzing trace with hash 661037878, now seen corresponding path program 47 times [2021-06-05 05:15:13,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:13,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489305722] [2021-06-05 05:15:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:13,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:13,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489305722] [2021-06-05 05:15:13,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489305722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:13,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869628514] [2021-06-05 05:15:13,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:13,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:13,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:13,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:13,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:13,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:13,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:13,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:13,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:13,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869628514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:13,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:13,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:13,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589593290] [2021-06-05 05:15:13,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:13,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:13,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:13,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:13,404 INFO L87 Difference]: Start difference. First operand 1608 states and 5632 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:14,485 INFO L93 Difference]: Finished difference Result 2113 states and 7205 transitions. [2021-06-05 05:15:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:15:14,486 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:14,489 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 05:15:14,489 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 05:15:14,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:15:14,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 05:15:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1614. [2021-06-05 05:15:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 3.5015499070055798) internal successors, (5648), 1613 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5648 transitions. [2021-06-05 05:15:14,511 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5648 transitions. Word has length 24 [2021-06-05 05:15:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:14,511 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 5648 transitions. [2021-06-05 05:15:14,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5648 transitions. [2021-06-05 05:15:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:14,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:14,513 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:14,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:14,714 INFO L430 AbstractCegarLoop]: === Iteration 151 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash -172700562, now seen corresponding path program 48 times [2021-06-05 05:15:14,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:14,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055498174] [2021-06-05 05:15:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:14,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:14,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055498174] [2021-06-05 05:15:14,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055498174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:14,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979201711] [2021-06-05 05:15:14,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:14,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:14,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:15,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:15,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:15:15,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:15,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:15,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:15,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:15:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:15,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979201711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:15,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:15,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:15:15,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935369007] [2021-06-05 05:15:15,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:15,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:15,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:15,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:15,108 INFO L87 Difference]: Start difference. First operand 1614 states and 5648 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:16,588 INFO L93 Difference]: Finished difference Result 2241 states and 7546 transitions. [2021-06-05 05:15:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:15:16,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:16,592 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 05:15:16,592 INFO L226 Difference]: Without dead ends: 2222 [2021-06-05 05:15:16,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1167.3ms TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:15:16,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-05 05:15:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1621. [2021-06-05 05:15:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.504938271604938) internal successors, (5678), 1620 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5678 transitions. [2021-06-05 05:15:16,616 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5678 transitions. Word has length 24 [2021-06-05 05:15:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:16,616 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5678 transitions. [2021-06-05 05:15:16,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5678 transitions. [2021-06-05 05:15:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:16,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:16,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:16,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 05:15:16,818 INFO L430 AbstractCegarLoop]: === Iteration 152 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash 609133238, now seen corresponding path program 49 times [2021-06-05 05:15:16,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:16,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90562457] [2021-06-05 05:15:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:16,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:16,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90562457] [2021-06-05 05:15:16,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90562457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:16,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422364329] [2021-06-05 05:15:16,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:17,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:17,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:17,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:17,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:17,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:17,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:17,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:17,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422364329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:17,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:17,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:15:17,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951468900] [2021-06-05 05:15:17,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:17,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:17,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:17,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:17,166 INFO L87 Difference]: Start difference. First operand 1621 states and 5678 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:18,007 INFO L93 Difference]: Finished difference Result 2080 states and 7089 transitions. [2021-06-05 05:15:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:15:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:18,010 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 05:15:18,010 INFO L226 Difference]: Without dead ends: 2070 [2021-06-05 05:15:18,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 750.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:15:18,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-05 05:15:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1615. [2021-06-05 05:15:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.507434944237918) internal successors, (5661), 1614 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5661 transitions. [2021-06-05 05:15:18,032 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5661 transitions. Word has length 24 [2021-06-05 05:15:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:18,032 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5661 transitions. [2021-06-05 05:15:18,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5661 transitions. [2021-06-05 05:15:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:18,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:18,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:18,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 05:15:18,235 INFO L430 AbstractCegarLoop]: === Iteration 153 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash -451513034, now seen corresponding path program 50 times [2021-06-05 05:15:18,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:18,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243433744] [2021-06-05 05:15:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:18,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:18,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243433744] [2021-06-05 05:15:18,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243433744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:18,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573472716] [2021-06-05 05:15:18,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:18,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:18,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:18,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:15:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:18,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:18,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:18,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 05:15:18,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:18,689 INFO L628 ElimStorePlain]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 05:15:18,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:18,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:33 [2021-06-05 05:15:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:18,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573472716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:18,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:18,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:15:18,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723677846] [2021-06-05 05:15:18,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:15:18,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:18,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:15:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:15:18,771 INFO L87 Difference]: Start difference. First operand 1615 states and 5661 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:20,026 INFO L93 Difference]: Finished difference Result 2143 states and 7250 transitions. [2021-06-05 05:15:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:15:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:20,030 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 05:15:20,030 INFO L226 Difference]: Without dead ends: 2116 [2021-06-05 05:15:20,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1086.7ms TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:15:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-06-05 05:15:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1621. [2021-06-05 05:15:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.50679012345679) internal successors, (5681), 1620 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5681 transitions. [2021-06-05 05:15:20,051 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5681 transitions. Word has length 24 [2021-06-05 05:15:20,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:20,052 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5681 transitions. [2021-06-05 05:15:20,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:20,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5681 transitions. [2021-06-05 05:15:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:20,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:20,054 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:20,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 05:15:20,257 INFO L430 AbstractCegarLoop]: === Iteration 154 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1277158712, now seen corresponding path program 51 times [2021-06-05 05:15:20,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:20,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810997952] [2021-06-05 05:15:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:20,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810997952] [2021-06-05 05:15:20,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810997952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205862428] [2021-06-05 05:15:20,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:20,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:15:20,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:20,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:20,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:20,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:15:20,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:20,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:20,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:20,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:15:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:20,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205862428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:20,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:20,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:15:20,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875683994] [2021-06-05 05:15:20,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:20,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:20,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:20,680 INFO L87 Difference]: Start difference. First operand 1621 states and 5681 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:22,439 INFO L93 Difference]: Finished difference Result 2143 states and 7279 transitions. [2021-06-05 05:15:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:15:22,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:22,442 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 05:15:22,442 INFO L226 Difference]: Without dead ends: 2124 [2021-06-05 05:15:22,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1464.9ms TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:15:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-05 05:15:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1623. [2021-06-05 05:15:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.5067817509247843) internal successors, (5688), 1622 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5688 transitions. [2021-06-05 05:15:22,463 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5688 transitions. Word has length 24 [2021-06-05 05:15:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:22,463 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5688 transitions. [2021-06-05 05:15:22,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5688 transitions. [2021-06-05 05:15:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:22,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:22,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:22,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-06-05 05:15:22,665 INFO L430 AbstractCegarLoop]: === Iteration 155 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:22,666 INFO L82 PathProgramCache]: Analyzing trace with hash 249008852, now seen corresponding path program 52 times [2021-06-05 05:15:22,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:22,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971011062] [2021-06-05 05:15:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:22,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971011062] [2021-06-05 05:15:22,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971011062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:22,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161012341] [2021-06-05 05:15:22,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:22,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:22,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:22,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:22,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:22,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:22,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:22,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:22,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:22,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:22,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161012341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:22,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:22,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:22,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607011633] [2021-06-05 05:15:22,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:22,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:22,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:22,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:22,985 INFO L87 Difference]: Start difference. First operand 1623 states and 5688 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:23,878 INFO L93 Difference]: Finished difference Result 2073 states and 7090 transitions. [2021-06-05 05:15:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:15:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:23,881 INFO L225 Difference]: With dead ends: 2073 [2021-06-05 05:15:23,881 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 05:15:23,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 730.1ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:15:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 05:15:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1632. [2021-06-05 05:15:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.505824647455549) internal successors, (5718), 1631 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5718 transitions. [2021-06-05 05:15:23,901 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5718 transitions. Word has length 24 [2021-06-05 05:15:23,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:23,901 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 5718 transitions. [2021-06-05 05:15:23,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5718 transitions. [2021-06-05 05:15:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:23,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:23,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:24,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 05:15:24,105 INFO L430 AbstractCegarLoop]: === Iteration 156 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:24,105 INFO L82 PathProgramCache]: Analyzing trace with hash 572595030, now seen corresponding path program 53 times [2021-06-05 05:15:24,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:24,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163659878] [2021-06-05 05:15:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:24,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:24,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163659878] [2021-06-05 05:15:24,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163659878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:24,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420333667] [2021-06-05 05:15:24,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:24,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:24,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:24,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:24,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:24,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:24,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:24,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:24,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:24,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420333667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:24,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:24,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:24,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135710244] [2021-06-05 05:15:24,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:24,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:24,434 INFO L87 Difference]: Start difference. First operand 1632 states and 5718 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:25,226 INFO L93 Difference]: Finished difference Result 2042 states and 7006 transitions. [2021-06-05 05:15:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:15:25,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:25,230 INFO L225 Difference]: With dead ends: 2042 [2021-06-05 05:15:25,230 INFO L226 Difference]: Without dead ends: 2029 [2021-06-05 05:15:25,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 720.5ms TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:15:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-05 05:15:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1624. [2021-06-05 05:15:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.507085643869378) internal successors, (5692), 1623 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5692 transitions. [2021-06-05 05:15:25,256 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5692 transitions. Word has length 24 [2021-06-05 05:15:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:25,257 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 5692 transitions. [2021-06-05 05:15:25,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5692 transitions. [2021-06-05 05:15:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:25,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:25,259 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:25,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 05:15:25,459 INFO L430 AbstractCegarLoop]: === Iteration 157 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:25,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:25,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1571465606, now seen corresponding path program 54 times [2021-06-05 05:15:25,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:25,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046285173] [2021-06-05 05:15:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:25,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:25,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046285173] [2021-06-05 05:15:25,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046285173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:25,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256570314] [2021-06-05 05:15:25,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:25,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:15:25,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:25,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:25,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:25,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 05:15:25,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:15:25,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:25,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:25,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 05:15:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:25,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256570314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:25,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:25,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:15:25,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031475089] [2021-06-05 05:15:25,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:15:25,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:25,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:15:25,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:15:25,949 INFO L87 Difference]: Start difference. First operand 1624 states and 5692 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:26,946 INFO L93 Difference]: Finished difference Result 2123 states and 7198 transitions. [2021-06-05 05:15:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:15:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:26,949 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 05:15:26,949 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 05:15:26,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 833.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:15:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 05:15:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1630. [2021-06-05 05:15:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.5058317986494782) internal successors, (5711), 1629 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5711 transitions. [2021-06-05 05:15:26,969 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5711 transitions. Word has length 24 [2021-06-05 05:15:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:26,969 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5711 transitions. [2021-06-05 05:15:26,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5711 transitions. [2021-06-05 05:15:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:26,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:26,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:27,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:27,185 INFO L430 AbstractCegarLoop]: === Iteration 158 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1459204208, now seen corresponding path program 55 times [2021-06-05 05:15:27,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:27,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386287320] [2021-06-05 05:15:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:27,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:27,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386287320] [2021-06-05 05:15:27,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386287320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:27,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279386402] [2021-06-05 05:15:27,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:27,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:27,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:27,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:27,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:27,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:27,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:15:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:27,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279386402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:27,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:27,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:15:27,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087054490] [2021-06-05 05:15:27,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:27,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:27,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:27,608 INFO L87 Difference]: Start difference. First operand 1630 states and 5711 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:28,684 INFO L93 Difference]: Finished difference Result 2123 states and 7240 transitions. [2021-06-05 05:15:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:15:28,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:28,687 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 05:15:28,687 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 05:15:28,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 887.3ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:15:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 05:15:28,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1629. [2021-06-05 05:15:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.5067567567567566) internal successors, (5709), 1628 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5709 transitions. [2021-06-05 05:15:28,719 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5709 transitions. Word has length 24 [2021-06-05 05:15:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:28,720 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 5709 transitions. [2021-06-05 05:15:28,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5709 transitions. [2021-06-05 05:15:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:28,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:28,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:28,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:28,922 INFO L430 AbstractCegarLoop]: === Iteration 159 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:28,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1635745640, now seen corresponding path program 56 times [2021-06-05 05:15:28,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:28,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621457341] [2021-06-05 05:15:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:29,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621457341] [2021-06-05 05:15:29,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621457341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274863117] [2021-06-05 05:15:29,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:29,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:29,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:29,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:29,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:29,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:29,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:15:29,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:29,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:29,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:29,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:15:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:29,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274863117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:29,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:29,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:15:29,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554766695] [2021-06-05 05:15:29,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:29,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:29,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:29,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:29,322 INFO L87 Difference]: Start difference. First operand 1629 states and 5709 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:30,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:30,923 INFO L93 Difference]: Finished difference Result 2214 states and 7495 transitions. [2021-06-05 05:15:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:15:30,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:30,926 INFO L225 Difference]: With dead ends: 2214 [2021-06-05 05:15:30,927 INFO L226 Difference]: Without dead ends: 2195 [2021-06-05 05:15:30,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1323.3ms TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:15:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-06-05 05:15:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1638. [2021-06-05 05:15:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.5070250458155163) internal successors, (5741), 1637 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5741 transitions. [2021-06-05 05:15:30,948 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5741 transitions. Word has length 24 [2021-06-05 05:15:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:30,948 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5741 transitions. [2021-06-05 05:15:30,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5741 transitions. [2021-06-05 05:15:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:30,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:30,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:31,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:31,150 INFO L430 AbstractCegarLoop]: === Iteration 160 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1825483216, now seen corresponding path program 57 times [2021-06-05 05:15:31,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:31,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812590613] [2021-06-05 05:15:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812590613] [2021-06-05 05:15:31,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812590613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977989013] [2021-06-05 05:15:31,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:31,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:31,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:31,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:31,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:31,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:31,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:31,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:31,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:31,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:31,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977989013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:31,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:31,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:31,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608550153] [2021-06-05 05:15:31,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:31,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:31,515 INFO L87 Difference]: Start difference. First operand 1638 states and 5741 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:32,377 INFO L93 Difference]: Finished difference Result 2105 states and 7183 transitions. [2021-06-05 05:15:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:15:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:32,380 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 05:15:32,380 INFO L226 Difference]: Without dead ends: 2095 [2021-06-05 05:15:32,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:15:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-05 05:15:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1636. [2021-06-05 05:15:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.507645259938838) internal successors, (5735), 1635 states have internal predecessors, (5735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5735 transitions. [2021-06-05 05:15:32,400 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5735 transitions. Word has length 24 [2021-06-05 05:15:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:32,400 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 5735 transitions. [2021-06-05 05:15:32,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5735 transitions. [2021-06-05 05:15:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:32,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:32,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:32,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 05:15:32,602 INFO L430 AbstractCegarLoop]: === Iteration 161 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash 224079120, now seen corresponding path program 58 times [2021-06-05 05:15:32,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:32,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728163175] [2021-06-05 05:15:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:32,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:32,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728163175] [2021-06-05 05:15:32,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728163175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:32,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292737086] [2021-06-05 05:15:32,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:32,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:32,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:32,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:32,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:32,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:32,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:32,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:32,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:32,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:15:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:32,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292737086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:32,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:32,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:15:32,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776578255] [2021-06-05 05:15:32,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:32,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:32,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:32,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:32,985 INFO L87 Difference]: Start difference. First operand 1636 states and 5735 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:34,178 INFO L93 Difference]: Finished difference Result 2128 states and 7250 transitions. [2021-06-05 05:15:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:15:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:34,182 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 05:15:34,182 INFO L226 Difference]: Without dead ends: 2109 [2021-06-05 05:15:34,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 897.3ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-06-05 05:15:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1643. [2021-06-05 05:15:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 3.509744214372716) internal successors, (5763), 1642 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5763 transitions. [2021-06-05 05:15:34,204 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5763 transitions. Word has length 24 [2021-06-05 05:15:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:34,204 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 5763 transitions. [2021-06-05 05:15:34,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5763 transitions. [2021-06-05 05:15:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:34,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:34,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:34,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 05:15:34,422 INFO L430 AbstractCegarLoop]: === Iteration 162 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:34,422 INFO L82 PathProgramCache]: Analyzing trace with hash -804070740, now seen corresponding path program 59 times [2021-06-05 05:15:34,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:34,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915486831] [2021-06-05 05:15:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:34,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:34,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915486831] [2021-06-05 05:15:34,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915486831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:34,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980234897] [2021-06-05 05:15:34,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:34,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:34,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:34,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:34,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:34,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:34,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:34,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:34,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980234897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:34,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:34,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:34,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050523545] [2021-06-05 05:15:34,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:34,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:34,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:34,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:34,781 INFO L87 Difference]: Start difference. First operand 1643 states and 5763 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:35,582 INFO L93 Difference]: Finished difference Result 2129 states and 7275 transitions. [2021-06-05 05:15:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:15:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:35,585 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 05:15:35,585 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 05:15:35,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 722.5ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:15:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 05:15:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1651. [2021-06-05 05:15:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.5090909090909093) internal successors, (5790), 1650 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5790 transitions. [2021-06-05 05:15:35,607 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5790 transitions. Word has length 24 [2021-06-05 05:15:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:35,607 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5790 transitions. [2021-06-05 05:15:35,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5790 transitions. [2021-06-05 05:15:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:35,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:35,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:35,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 05:15:35,810 INFO L430 AbstractCegarLoop]: === Iteration 163 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash -480484562, now seen corresponding path program 60 times [2021-06-05 05:15:35,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:35,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313286107] [2021-06-05 05:15:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:35,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:35,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313286107] [2021-06-05 05:15:35,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313286107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:35,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14110422] [2021-06-05 05:15:35,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:35,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:15:35,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:36,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:36,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:36,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:15:36,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:36,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:36,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:36,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:15:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:36,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14110422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:36,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:36,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:15:36,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15338092] [2021-06-05 05:15:36,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:36,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:36,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:36,216 INFO L87 Difference]: Start difference. First operand 1651 states and 5790 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:37,321 INFO L93 Difference]: Finished difference Result 2134 states and 7234 transitions. [2021-06-05 05:15:37,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:37,321 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:37,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:37,324 INFO L225 Difference]: With dead ends: 2134 [2021-06-05 05:15:37,325 INFO L226 Difference]: Without dead ends: 2115 [2021-06-05 05:15:37,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 908.5ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-05 05:15:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1650. [2021-06-05 05:15:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.5106124924196482) internal successors, (5789), 1649 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5789 transitions. [2021-06-05 05:15:37,346 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5789 transitions. Word has length 24 [2021-06-05 05:15:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:37,347 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5789 transitions. [2021-06-05 05:15:37,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5789 transitions. [2021-06-05 05:15:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:37,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:37,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:37,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 05:15:37,549 INFO L430 AbstractCegarLoop]: === Iteration 164 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1205259560, now seen corresponding path program 61 times [2021-06-05 05:15:37,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:37,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923125672] [2021-06-05 05:15:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:37,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:37,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923125672] [2021-06-05 05:15:37,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923125672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:37,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744232612] [2021-06-05 05:15:37,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:37,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:37,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:37,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:37,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:37,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:37,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:37,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:37,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744232612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:37,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:37,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:15:37,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484744534] [2021-06-05 05:15:37,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:37,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:37,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:37,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:37,889 INFO L87 Difference]: Start difference. First operand 1650 states and 5789 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:38,675 INFO L93 Difference]: Finished difference Result 2040 states and 6997 transitions. [2021-06-05 05:15:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:15:38,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:38,679 INFO L225 Difference]: With dead ends: 2040 [2021-06-05 05:15:38,679 INFO L226 Difference]: Without dead ends: 2027 [2021-06-05 05:15:38,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:15:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-05 05:15:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1645. [2021-06-05 05:15:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.5097323600973236) internal successors, (5770), 1644 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5770 transitions. [2021-06-05 05:15:38,702 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5770 transitions. Word has length 24 [2021-06-05 05:15:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:38,702 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5770 transitions. [2021-06-05 05:15:38,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5770 transitions. [2021-06-05 05:15:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:38,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:38,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:38,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:38,921 INFO L430 AbstractCegarLoop]: === Iteration 165 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash 843525824, now seen corresponding path program 62 times [2021-06-05 05:15:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:38,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946600232] [2021-06-05 05:15:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:39,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:39,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946600232] [2021-06-05 05:15:39,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946600232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:39,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050127296] [2021-06-05 05:15:39,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:39,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:15:39,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:39,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:39,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 05:15:39,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:39,383 INFO L628 ElimStorePlain]: treesize reduction 3, result has 85.0 percent of original size [2021-06-05 05:15:39,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:39,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 05:15:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:39,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050127296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:39,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:39,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:15:39,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524757012] [2021-06-05 05:15:39,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:15:39,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:39,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:15:39,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:15:39,438 INFO L87 Difference]: Start difference. First operand 1645 states and 5770 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:40,091 INFO L93 Difference]: Finished difference Result 2123 states and 7208 transitions. [2021-06-05 05:15:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:15:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:40,095 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 05:15:40,095 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 05:15:40,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 552.4ms TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:15:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 05:15:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1648. [2021-06-05 05:15:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 3.5088038858530664) internal successors, (5779), 1647 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 5779 transitions. [2021-06-05 05:15:40,116 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 5779 transitions. Word has length 24 [2021-06-05 05:15:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:40,116 INFO L482 AbstractCegarLoop]: Abstraction has 1648 states and 5779 transitions. [2021-06-05 05:15:40,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 5779 transitions. [2021-06-05 05:15:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:40,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:40,118 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:40,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:40,319 INFO L430 AbstractCegarLoop]: === Iteration 166 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:40,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1060950710, now seen corresponding path program 63 times [2021-06-05 05:15:40,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:40,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013957347] [2021-06-05 05:15:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:40,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:40,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013957347] [2021-06-05 05:15:40,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013957347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:40,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976151652] [2021-06-05 05:15:40,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:40,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:40,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:40,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:15:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:40,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:40,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:15:40,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:40,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:40,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:40,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 05:15:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:40,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976151652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:40,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:40,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:15:40,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350948277] [2021-06-05 05:15:40,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:40,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:40,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:40,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:40,849 INFO L87 Difference]: Start difference. First operand 1648 states and 5779 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:41,894 INFO L93 Difference]: Finished difference Result 2110 states and 7189 transitions. [2021-06-05 05:15:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:41,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:41,898 INFO L225 Difference]: With dead ends: 2110 [2021-06-05 05:15:41,898 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 05:15:41,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 910.6ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:15:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 05:15:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1651. [2021-06-05 05:15:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.5090909090909093) internal successors, (5790), 1650 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5790 transitions. [2021-06-05 05:15:41,919 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5790 transitions. Word has length 24 [2021-06-05 05:15:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:41,919 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5790 transitions. [2021-06-05 05:15:41,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5790 transitions. [2021-06-05 05:15:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:41,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:41,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:42,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:42,122 INFO L430 AbstractCegarLoop]: === Iteration 167 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:42,122 INFO L82 PathProgramCache]: Analyzing trace with hash 227212270, now seen corresponding path program 64 times [2021-06-05 05:15:42,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:42,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970595217] [2021-06-05 05:15:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:42,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:42,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970595217] [2021-06-05 05:15:42,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970595217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:42,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36519643] [2021-06-05 05:15:42,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:42,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:42,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:42,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:42,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:42,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:42,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:42,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:42,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:15:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:42,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36519643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:42,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:42,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:42,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224414141] [2021-06-05 05:15:42,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:42,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:42,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:42,500 INFO L87 Difference]: Start difference. First operand 1651 states and 5790 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:43,347 INFO L93 Difference]: Finished difference Result 2132 states and 7279 transitions. [2021-06-05 05:15:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:15:43,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:43,352 INFO L225 Difference]: With dead ends: 2132 [2021-06-05 05:15:43,352 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 05:15:43,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:15:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 05:15:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1649. [2021-06-05 05:15:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.5097087378640777) internal successors, (5784), 1648 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5784 transitions. [2021-06-05 05:15:43,372 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5784 transitions. Word has length 24 [2021-06-05 05:15:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:43,372 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5784 transitions. [2021-06-05 05:15:43,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5784 transitions. [2021-06-05 05:15:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:43,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:43,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:43,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:43,581 INFO L430 AbstractCegarLoop]: === Iteration 168 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:43,581 INFO L82 PathProgramCache]: Analyzing trace with hash -605413130, now seen corresponding path program 65 times [2021-06-05 05:15:43,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:43,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617163154] [2021-06-05 05:15:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:43,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617163154] [2021-06-05 05:15:43,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617163154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605105739] [2021-06-05 05:15:43,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:43,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:43,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:43,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:43,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:43,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:43,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:43,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:43,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:43,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:15:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:43,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605105739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:43,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:43,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:43,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351535006] [2021-06-05 05:15:43,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:43,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:43,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:43,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:43,957 INFO L87 Difference]: Start difference. First operand 1649 states and 5784 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:44,831 INFO L93 Difference]: Finished difference Result 2060 states and 7057 transitions. [2021-06-05 05:15:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:15:44,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:44,835 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 05:15:44,835 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 05:15:44,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 746.6ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:15:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 05:15:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1653. [2021-06-05 05:15:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.5090799031476996) internal successors, (5797), 1652 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5797 transitions. [2021-06-05 05:15:44,856 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5797 transitions. Word has length 24 [2021-06-05 05:15:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:44,856 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5797 transitions. [2021-06-05 05:15:44,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5797 transitions. [2021-06-05 05:15:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:44,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:44,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:45,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:45,069 INFO L430 AbstractCegarLoop]: === Iteration 169 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash -281826952, now seen corresponding path program 66 times [2021-06-05 05:15:45,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:45,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083542367] [2021-06-05 05:15:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:45,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:45,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083542367] [2021-06-05 05:15:45,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083542367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:45,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550225983] [2021-06-05 05:15:45,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:45,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:45,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:45,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:15:45,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:45,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:45,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:45,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:15:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:45,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550225983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:45,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:45,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:15:45,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380280530] [2021-06-05 05:15:45,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:45,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:45,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:45,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:45,456 INFO L87 Difference]: Start difference. First operand 1653 states and 5797 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:46,589 INFO L93 Difference]: Finished difference Result 2157 states and 7303 transitions. [2021-06-05 05:15:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:15:46,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:46,592 INFO L225 Difference]: With dead ends: 2157 [2021-06-05 05:15:46,592 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 05:15:46,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1020.6ms TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:15:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 05:15:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1657. [2021-06-05 05:15:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.510265700483092) internal successors, (5813), 1656 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5813 transitions. [2021-06-05 05:15:46,614 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5813 transitions. Word has length 24 [2021-06-05 05:15:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:46,614 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 5813 transitions. [2021-06-05 05:15:46,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5813 transitions. [2021-06-05 05:15:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:46,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:46,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:46,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:46,816 INFO L430 AbstractCegarLoop]: === Iteration 170 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1403917170, now seen corresponding path program 67 times [2021-06-05 05:15:46,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:46,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382774026] [2021-06-05 05:15:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:46,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382774026] [2021-06-05 05:15:46,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382774026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892955496] [2021-06-05 05:15:46,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:47,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:47,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:47,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:47,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:47,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:15:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:47,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892955496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:47,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:47,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:15:47,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069156244] [2021-06-05 05:15:47,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:47,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:47,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:47,144 INFO L87 Difference]: Start difference. First operand 1657 states and 5813 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:47,913 INFO L93 Difference]: Finished difference Result 2022 states and 6937 transitions. [2021-06-05 05:15:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:15:47,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:47,917 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 05:15:47,917 INFO L226 Difference]: Without dead ends: 2011 [2021-06-05 05:15:47,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:15:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-06-05 05:15:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1656. [2021-06-05 05:15:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.5099697885196375) internal successors, (5809), 1655 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5809 transitions. [2021-06-05 05:15:47,936 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5809 transitions. Word has length 24 [2021-06-05 05:15:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:47,936 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 5809 transitions. [2021-06-05 05:15:47,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5809 transitions. [2021-06-05 05:15:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:47,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:47,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:48,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 05:15:48,139 INFO L430 AbstractCegarLoop]: === Iteration 171 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:48,139 INFO L82 PathProgramCache]: Analyzing trace with hash -308336314, now seen corresponding path program 68 times [2021-06-05 05:15:48,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:48,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491983671] [2021-06-05 05:15:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:48,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:48,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491983671] [2021-06-05 05:15:48,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491983671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:48,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899811036] [2021-06-05 05:15:48,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:48,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:48,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:48,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:48,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:48,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:48,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:48,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:48,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:48,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:15:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:48,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899811036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:48,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:48,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:48,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375639328] [2021-06-05 05:15:48,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:48,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:48,445 INFO L87 Difference]: Start difference. First operand 1656 states and 5809 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:49,299 INFO L93 Difference]: Finished difference Result 2080 states and 7118 transitions. [2021-06-05 05:15:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:15:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:49,303 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 05:15:49,303 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 05:15:49,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 669.2ms TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:15:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 05:15:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1657. [2021-06-05 05:15:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.510265700483092) internal successors, (5813), 1656 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5813 transitions. [2021-06-05 05:15:49,325 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5813 transitions. Word has length 24 [2021-06-05 05:15:49,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:49,325 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 5813 transitions. [2021-06-05 05:15:49,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:49,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5813 transitions. [2021-06-05 05:15:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:49,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:49,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:49,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 05:15:49,533 INFO L430 AbstractCegarLoop]: === Iteration 172 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2099197488, now seen corresponding path program 69 times [2021-06-05 05:15:49,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:49,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857660479] [2021-06-05 05:15:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:49,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:49,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857660479] [2021-06-05 05:15:49,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857660479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:49,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553371924] [2021-06-05 05:15:49,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:49,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:15:49,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:15:49,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:49,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:49,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-06-05 05:15:49,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:49,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:49,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:49,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:476 [2021-06-05 05:15:50,050 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 05:15:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:50,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553371924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:50,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:50,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:15:50,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569819744] [2021-06-05 05:15:50,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:50,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:50,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:50,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:50,322 INFO L87 Difference]: Start difference. First operand 1657 states and 5813 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:51,192 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 05:15:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:52,392 INFO L93 Difference]: Finished difference Result 2129 states and 7217 transitions. [2021-06-05 05:15:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:15:52,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:52,396 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 05:15:52,396 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 05:15:52,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2149.1ms TimeCoverageRelationStatistics Valid=471, Invalid=2285, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:15:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 05:15:52,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1661. [2021-06-05 05:15:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.5096385542168673) internal successors, (5826), 1660 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5826 transitions. [2021-06-05 05:15:52,424 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5826 transitions. Word has length 24 [2021-06-05 05:15:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:52,425 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5826 transitions. [2021-06-05 05:15:52,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5826 transitions. [2021-06-05 05:15:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:52,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:52,427 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:52,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 05:15:52,629 INFO L430 AbstractCegarLoop]: === Iteration 173 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1317363688, now seen corresponding path program 70 times [2021-06-05 05:15:52,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:52,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151861868] [2021-06-05 05:15:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:52,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:52,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151861868] [2021-06-05 05:15:52,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151861868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:52,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596364712] [2021-06-05 05:15:52,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:52,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:52,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:52,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:52,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:52,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:52,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:52,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:52,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:15:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:52,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596364712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:52,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:52,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:15:52,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348203686] [2021-06-05 05:15:52,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:52,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:52,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:52,944 INFO L87 Difference]: Start difference. First operand 1661 states and 5826 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:53,512 INFO L93 Difference]: Finished difference Result 2022 states and 6939 transitions. [2021-06-05 05:15:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:15:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:53,515 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 05:15:53,515 INFO L226 Difference]: Without dead ends: 2012 [2021-06-05 05:15:53,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:15:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-05 05:15:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1658. [2021-06-05 05:15:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.5093542546771275) internal successors, (5815), 1657 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5815 transitions. [2021-06-05 05:15:53,535 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5815 transitions. Word has length 24 [2021-06-05 05:15:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:53,535 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5815 transitions. [2021-06-05 05:15:53,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5815 transitions. [2021-06-05 05:15:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:53,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:53,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:53,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:53,739 INFO L430 AbstractCegarLoop]: === Iteration 174 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash -372308144, now seen corresponding path program 71 times [2021-06-05 05:15:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:53,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623568684] [2021-06-05 05:15:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:53,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:53,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623568684] [2021-06-05 05:15:53,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623568684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:53,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502119669] [2021-06-05 05:15:53,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:53,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:15:53,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:53,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:54,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:54,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:54,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:54,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:54,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:15:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:54,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502119669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:54,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:54,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:15:54,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086220863] [2021-06-05 05:15:54,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:54,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:54,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:54,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:54,075 INFO L87 Difference]: Start difference. First operand 1658 states and 5815 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:54,850 INFO L93 Difference]: Finished difference Result 2057 states and 7052 transitions. [2021-06-05 05:15:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:15:54,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:54,853 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 05:15:54,853 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 05:15:54,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 658.4ms TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:15:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 05:15:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1660. [2021-06-05 05:15:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.5087402049427365) internal successors, (5821), 1659 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5821 transitions. [2021-06-05 05:15:54,874 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5821 transitions. Word has length 24 [2021-06-05 05:15:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:54,875 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5821 transitions. [2021-06-05 05:15:54,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5821 transitions. [2021-06-05 05:15:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:54,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:54,877 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:55,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:55,077 INFO L430 AbstractCegarLoop]: === Iteration 175 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash 607106304, now seen corresponding path program 72 times [2021-06-05 05:15:55,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:55,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336588049] [2021-06-05 05:15:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:55,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:55,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336588049] [2021-06-05 05:15:55,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336588049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:55,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663958578] [2021-06-05 05:15:55,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:55,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:15:55,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:55,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:55,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:55,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:15:55,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:55,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:55,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:55,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:15:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:55,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663958578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:55,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:55,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:15:55,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654607849] [2021-06-05 05:15:55,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:55,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:55,471 INFO L87 Difference]: Start difference. First operand 1660 states and 5821 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:56,643 INFO L93 Difference]: Finished difference Result 2168 states and 7318 transitions. [2021-06-05 05:15:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:15:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:56,646 INFO L225 Difference]: With dead ends: 2168 [2021-06-05 05:15:56,646 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 05:15:56,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 986.9ms TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:15:56,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 05:15:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1662. [2021-06-05 05:15:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.5099337748344372) internal successors, (5830), 1661 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5830 transitions. [2021-06-05 05:15:56,667 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5830 transitions. Word has length 24 [2021-06-05 05:15:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:56,667 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5830 transitions. [2021-06-05 05:15:56,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5830 transitions. [2021-06-05 05:15:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:56,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:56,669 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:56,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 05:15:56,870 INFO L430 AbstractCegarLoop]: === Iteration 176 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:56,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1967070794, now seen corresponding path program 73 times [2021-06-05 05:15:56,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:56,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175257904] [2021-06-05 05:15:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:56,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:56,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175257904] [2021-06-05 05:15:56,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175257904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:56,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393186575] [2021-06-05 05:15:56,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:57,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:57,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:15:57,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:57,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:57,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:57,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:15:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:57,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393186575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:57,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:57,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:15:57,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081967750] [2021-06-05 05:15:57,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:15:57,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:57,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:15:57,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:15:57,164 INFO L87 Difference]: Start difference. First operand 1662 states and 5830 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:57,792 INFO L93 Difference]: Finished difference Result 2006 states and 6892 transitions. [2021-06-05 05:15:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:15:57,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:57,795 INFO L225 Difference]: With dead ends: 2006 [2021-06-05 05:15:57,795 INFO L226 Difference]: Without dead ends: 1996 [2021-06-05 05:15:57,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 558.0ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:15:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-06-05 05:15:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1660. [2021-06-05 05:15:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.5099457504520797) internal successors, (5823), 1659 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5823 transitions. [2021-06-05 05:15:57,814 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5823 transitions. Word has length 24 [2021-06-05 05:15:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:57,814 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5823 transitions. [2021-06-05 05:15:57,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5823 transitions. [2021-06-05 05:15:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:57,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:57,816 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:58,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:58,017 INFO L430 AbstractCegarLoop]: === Iteration 177 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1147399810, now seen corresponding path program 69 times [2021-06-05 05:15:58,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:58,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639393119] [2021-06-05 05:15:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:58,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:58,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639393119] [2021-06-05 05:15:58,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639393119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:58,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784420439] [2021-06-05 05:15:58,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:58,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:15:58,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:58,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:15:58,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:58,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:58,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:15:58,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:58,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:58,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:58,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:58,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:15:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:58,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784420439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:58,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:58,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:15:58,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639321396] [2021-06-05 05:15:58,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:58,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:58,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:58,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:58,445 INFO L87 Difference]: Start difference. First operand 1660 states and 5823 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:59,409 INFO L93 Difference]: Finished difference Result 2254 states and 7645 transitions. [2021-06-05 05:15:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:15:59,409 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:15:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:59,412 INFO L225 Difference]: With dead ends: 2254 [2021-06-05 05:15:59,412 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 05:15:59,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 699.5ms TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:15:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 05:15:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1663. [2021-06-05 05:15:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.509025270758123) internal successors, (5832), 1662 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5832 transitions. [2021-06-05 05:15:59,432 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5832 transitions. Word has length 24 [2021-06-05 05:15:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:59,432 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5832 transitions. [2021-06-05 05:15:59,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5832 transitions. [2021-06-05 05:15:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:15:59,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:59,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:59,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:59,635 INFO L430 AbstractCegarLoop]: === Iteration 178 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:15:59,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:59,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1639485428, now seen corresponding path program 70 times [2021-06-05 05:15:59,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:59,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331018664] [2021-06-05 05:15:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:59,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:59,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331018664] [2021-06-05 05:15:59,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331018664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:59,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617546422] [2021-06-05 05:15:59,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:59,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:59,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:59,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:59,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:59,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:59,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:59,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:59,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:59,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:15:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:59,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617546422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:59,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:59,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:15:59,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716218979] [2021-06-05 05:15:59,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:59,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:59,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:59,959 INFO L87 Difference]: Start difference. First operand 1663 states and 5832 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:01,108 INFO L93 Difference]: Finished difference Result 2340 states and 7929 transitions. [2021-06-05 05:16:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:16:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:01,112 INFO L225 Difference]: With dead ends: 2340 [2021-06-05 05:16:01,112 INFO L226 Difference]: Without dead ends: 2318 [2021-06-05 05:16:01,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 823.1ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:16:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-06-05 05:16:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1666. [2021-06-05 05:16:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.5081081081081082) internal successors, (5841), 1665 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5841 transitions. [2021-06-05 05:16:01,133 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5841 transitions. Word has length 24 [2021-06-05 05:16:01,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:01,133 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 5841 transitions. [2021-06-05 05:16:01,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5841 transitions. [2021-06-05 05:16:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:01,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:01,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:01,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:01,336 INFO L430 AbstractCegarLoop]: === Iteration 179 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:01,336 INFO L82 PathProgramCache]: Analyzing trace with hash -719238356, now seen corresponding path program 71 times [2021-06-05 05:16:01,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:01,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196933092] [2021-06-05 05:16:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:01,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:01,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196933092] [2021-06-05 05:16:01,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196933092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:01,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34381534] [2021-06-05 05:16:01,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:01,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:01,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:01,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:01,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:01,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:01,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:01,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:01,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 05:16:01,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:01,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:01,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:01,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-05 05:16:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:01,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34381534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:01,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:01,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:16:01,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970218103] [2021-06-05 05:16:01,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:01,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:01,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:01,730 INFO L87 Difference]: Start difference. First operand 1666 states and 5841 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:02,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:02,809 INFO L93 Difference]: Finished difference Result 2248 states and 7620 transitions. [2021-06-05 05:16:02,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:16:02,809 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:02,812 INFO L225 Difference]: With dead ends: 2248 [2021-06-05 05:16:02,812 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 05:16:02,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 795.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1650, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:16:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 05:16:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1669. [2021-06-05 05:16:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.5071942446043165) internal successors, (5850), 1668 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5850 transitions. [2021-06-05 05:16:02,833 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5850 transitions. Word has length 24 [2021-06-05 05:16:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:02,833 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5850 transitions. [2021-06-05 05:16:02,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5850 transitions. [2021-06-05 05:16:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:02,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:02,835 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:03,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:03,037 INFO L430 AbstractCegarLoop]: === Iteration 180 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash -895779788, now seen corresponding path program 72 times [2021-06-05 05:16:03,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:03,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720429270] [2021-06-05 05:16:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:03,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720429270] [2021-06-05 05:16:03,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720429270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978350151] [2021-06-05 05:16:03,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:03,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:16:03,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:03,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:03,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:03,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:16:03,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:03,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:03,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:03,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:16:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:03,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978350151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:03,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:03,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:16:03,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583811368] [2021-06-05 05:16:03,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:03,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:03,403 INFO L87 Difference]: Start difference. First operand 1669 states and 5850 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:04,293 INFO L93 Difference]: Finished difference Result 2232 states and 7581 transitions. [2021-06-05 05:16:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:16:04,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:04,297 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 05:16:04,297 INFO L226 Difference]: Without dead ends: 2222 [2021-06-05 05:16:04,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 790.3ms TimeCoverageRelationStatistics Valid=310, Invalid=1760, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:16:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-05 05:16:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1673. [2021-06-05 05:16:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.5053827751196174) internal successors, (5861), 1672 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5861 transitions. [2021-06-05 05:16:04,319 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5861 transitions. Word has length 24 [2021-06-05 05:16:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:04,319 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 5861 transitions. [2021-06-05 05:16:04,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5861 transitions. [2021-06-05 05:16:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:04,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:04,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:04,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 05:16:04,522 INFO L430 AbstractCegarLoop]: === Iteration 181 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash -412454626, now seen corresponding path program 73 times [2021-06-05 05:16:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:04,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177516400] [2021-06-05 05:16:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:04,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177516400] [2021-06-05 05:16:04,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177516400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292539046] [2021-06-05 05:16:04,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:04,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:04,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:04,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:04,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:04,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:04,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:04,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292539046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:04,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:04,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:04,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056109153] [2021-06-05 05:16:04,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:04,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:04,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:04,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:04,840 INFO L87 Difference]: Start difference. First operand 1673 states and 5861 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:05,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:05,656 INFO L93 Difference]: Finished difference Result 2202 states and 7495 transitions. [2021-06-05 05:16:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:16:05,656 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:05,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:05,659 INFO L225 Difference]: With dead ends: 2202 [2021-06-05 05:16:05,659 INFO L226 Difference]: Without dead ends: 2191 [2021-06-05 05:16:05,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:16:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-06-05 05:16:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1660. [2021-06-05 05:16:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.5099457504520797) internal successors, (5823), 1659 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5823 transitions. [2021-06-05 05:16:05,681 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5823 transitions. Word has length 24 [2021-06-05 05:16:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:05,681 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5823 transitions. [2021-06-05 05:16:05,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5823 transitions. [2021-06-05 05:16:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:05,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:05,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:05,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 05:16:05,884 INFO L430 AbstractCegarLoop]: === Iteration 182 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:05,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1796534024, now seen corresponding path program 74 times [2021-06-05 05:16:05,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:05,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726893600] [2021-06-05 05:16:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:06,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:06,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726893600] [2021-06-05 05:16:06,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726893600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:06,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659814374] [2021-06-05 05:16:06,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:06,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:06,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:06,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:06,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:06,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:06,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:06,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:06,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:06,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:16:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:06,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659814374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:06,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:06,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:16:06,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708463689] [2021-06-05 05:16:06,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:06,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:06,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:06,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:06,299 INFO L87 Difference]: Start difference. First operand 1660 states and 5823 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:07,211 INFO L93 Difference]: Finished difference Result 2228 states and 7569 transitions. [2021-06-05 05:16:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:16:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:07,214 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 05:16:07,214 INFO L226 Difference]: Without dead ends: 2219 [2021-06-05 05:16:07,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:16:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-06-05 05:16:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1663. [2021-06-05 05:16:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.5096269554753308) internal successors, (5833), 1662 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5833 transitions. [2021-06-05 05:16:07,235 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5833 transitions. Word has length 24 [2021-06-05 05:16:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:07,235 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5833 transitions. [2021-06-05 05:16:07,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:07,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5833 transitions. [2021-06-05 05:16:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:07,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:07,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:07,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 05:16:07,438 INFO L430 AbstractCegarLoop]: === Iteration 183 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:07,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1586996644, now seen corresponding path program 75 times [2021-06-05 05:16:07,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:07,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710203751] [2021-06-05 05:16:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:07,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:07,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710203751] [2021-06-05 05:16:07,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710203751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:07,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355131450] [2021-06-05 05:16:07,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:07,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:16:07,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:07,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:07,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:07,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:07,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:07,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:16:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:07,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355131450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:07,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:07,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:16:07,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217928999] [2021-06-05 05:16:07,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:07,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:07,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:07,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:07,773 INFO L87 Difference]: Start difference. First operand 1663 states and 5833 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:08,861 INFO L93 Difference]: Finished difference Result 2272 states and 7714 transitions. [2021-06-05 05:16:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:16:08,861 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:08,864 INFO L225 Difference]: With dead ends: 2272 [2021-06-05 05:16:08,864 INFO L226 Difference]: Without dead ends: 2253 [2021-06-05 05:16:08,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 803.7ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:16:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-05 05:16:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1666. [2021-06-05 05:16:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.5093093093093093) internal successors, (5843), 1665 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5843 transitions. [2021-06-05 05:16:08,886 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5843 transitions. Word has length 24 [2021-06-05 05:16:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:08,886 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 5843 transitions. [2021-06-05 05:16:08,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5843 transitions. [2021-06-05 05:16:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:08,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:08,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:09,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:09,088 INFO L430 AbstractCegarLoop]: === Iteration 184 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash -979298906, now seen corresponding path program 76 times [2021-06-05 05:16:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:09,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602662466] [2021-06-05 05:16:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:09,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602662466] [2021-06-05 05:16:09,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602662466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604829485] [2021-06-05 05:16:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:09,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:09,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:09,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:09,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:09,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:09,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:09,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:09,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:16:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:09,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604829485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:09,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:09,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:16:09,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335471277] [2021-06-05 05:16:09,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:09,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:09,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:09,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:09,426 INFO L87 Difference]: Start difference. First operand 1666 states and 5843 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:10,438 INFO L93 Difference]: Finished difference Result 2224 states and 7572 transitions. [2021-06-05 05:16:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:16:10,438 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:10,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:10,441 INFO L225 Difference]: With dead ends: 2224 [2021-06-05 05:16:10,441 INFO L226 Difference]: Without dead ends: 2205 [2021-06-05 05:16:10,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 755.9ms TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:16:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-05 05:16:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1669. [2021-06-05 05:16:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.508992805755396) internal successors, (5853), 1668 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5853 transitions. [2021-06-05 05:16:10,461 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5853 transitions. Word has length 24 [2021-06-05 05:16:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:10,462 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5853 transitions. [2021-06-05 05:16:10,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5853 transitions. [2021-06-05 05:16:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:10,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:10,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:10,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 05:16:10,664 INFO L430 AbstractCegarLoop]: === Iteration 185 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:10,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:10,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2007448766, now seen corresponding path program 77 times [2021-06-05 05:16:10,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:10,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438860981] [2021-06-05 05:16:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:10,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:10,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438860981] [2021-06-05 05:16:10,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438860981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429956749] [2021-06-05 05:16:10,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:10,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:10,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:10,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:10,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:10,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:10,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429956749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:10,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:10,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451519700] [2021-06-05 05:16:10,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:10,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:10,954 INFO L87 Difference]: Start difference. First operand 1669 states and 5853 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:11,581 INFO L93 Difference]: Finished difference Result 2193 states and 7486 transitions. [2021-06-05 05:16:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:16:11,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:11,584 INFO L225 Difference]: With dead ends: 2193 [2021-06-05 05:16:11,584 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 05:16:11,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 546.4ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:16:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 05:16:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1676. [2021-06-05 05:16:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5074626865671643) internal successors, (5875), 1675 states have internal predecessors, (5875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5875 transitions. [2021-06-05 05:16:11,613 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5875 transitions. Word has length 24 [2021-06-05 05:16:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:11,613 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5875 transitions. [2021-06-05 05:16:11,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5875 transitions. [2021-06-05 05:16:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:11,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:11,615 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:11,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:11,816 INFO L430 AbstractCegarLoop]: === Iteration 186 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:11,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1881534, now seen corresponding path program 78 times [2021-06-05 05:16:11,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:11,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271294749] [2021-06-05 05:16:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:11,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:11,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271294749] [2021-06-05 05:16:11,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271294749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:11,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454643083] [2021-06-05 05:16:11,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:11,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:16:11,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:16:11,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:12,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:12,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:12,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:16:12,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:12,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:12,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:16:12,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:118 [2021-06-05 05:16:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:12,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454643083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:12,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:12,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:16:12,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803815888] [2021-06-05 05:16:12,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:12,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:12,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:12,232 INFO L87 Difference]: Start difference. First operand 1676 states and 5875 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:13,180 INFO L93 Difference]: Finished difference Result 2099 states and 7191 transitions. [2021-06-05 05:16:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:16:13,180 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:13,183 INFO L225 Difference]: With dead ends: 2099 [2021-06-05 05:16:13,183 INFO L226 Difference]: Without dead ends: 2086 [2021-06-05 05:16:13,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 780.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:16:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-05 05:16:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1680. [2021-06-05 05:16:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5080405002977963) internal successors, (5890), 1679 states have internal predecessors, (5890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5890 transitions. [2021-06-05 05:16:13,203 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5890 transitions. Word has length 24 [2021-06-05 05:16:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:13,203 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5890 transitions. [2021-06-05 05:16:13,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5890 transitions. [2021-06-05 05:16:13,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:13,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:13,205 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:13,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:13,406 INFO L430 AbstractCegarLoop]: === Iteration 187 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash -528846374, now seen corresponding path program 79 times [2021-06-05 05:16:13,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:13,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347722166] [2021-06-05 05:16:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:13,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:13,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347722166] [2021-06-05 05:16:13,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347722166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:13,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636004900] [2021-06-05 05:16:13,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:13,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:13,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:13,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:13,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:13,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:13,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:13,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636004900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:13,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:13,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:13,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492333077] [2021-06-05 05:16:13,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:13,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:13,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:13,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:13,709 INFO L87 Difference]: Start difference. First operand 1680 states and 5890 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:14,391 INFO L93 Difference]: Finished difference Result 2165 states and 7395 transitions. [2021-06-05 05:16:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:16:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:14,395 INFO L225 Difference]: With dead ends: 2165 [2021-06-05 05:16:14,395 INFO L226 Difference]: Without dead ends: 2156 [2021-06-05 05:16:14,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:16:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-05 05:16:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1669. [2021-06-05 05:16:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.5077937649880098) internal successors, (5851), 1668 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5851 transitions. [2021-06-05 05:16:14,418 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5851 transitions. Word has length 24 [2021-06-05 05:16:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:14,418 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5851 transitions. [2021-06-05 05:16:14,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5851 transitions. [2021-06-05 05:16:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:14,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:14,420 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:14,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 05:16:14,621 INFO L430 AbstractCegarLoop]: === Iteration 188 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1485847398, now seen corresponding path program 74 times [2021-06-05 05:16:14,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:14,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045555894] [2021-06-05 05:16:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:14,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:14,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045555894] [2021-06-05 05:16:14,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045555894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:14,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169625560] [2021-06-05 05:16:14,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:14,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:14,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:14,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:14,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:14,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:14,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:14,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:14,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:14,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:16:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:15,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169625560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:15,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:15,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:16:15,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981951257] [2021-06-05 05:16:15,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:15,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:15,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:15,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:15,005 INFO L87 Difference]: Start difference. First operand 1669 states and 5851 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:16,295 INFO L93 Difference]: Finished difference Result 2362 states and 7905 transitions. [2021-06-05 05:16:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:16:16,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:16,299 INFO L225 Difference]: With dead ends: 2362 [2021-06-05 05:16:16,299 INFO L226 Difference]: Without dead ends: 2302 [2021-06-05 05:16:16,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1035.1ms TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:16:16,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-06-05 05:16:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1674. [2021-06-05 05:16:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.506276150627615) internal successors, (5866), 1673 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5866 transitions. [2021-06-05 05:16:16,320 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5866 transitions. Word has length 24 [2021-06-05 05:16:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:16,320 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5866 transitions. [2021-06-05 05:16:16,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5866 transitions. [2021-06-05 05:16:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:16,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:16,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:16,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 05:16:16,522 INFO L430 AbstractCegarLoop]: === Iteration 189 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:16,523 INFO L82 PathProgramCache]: Analyzing trace with hash -221549916, now seen corresponding path program 75 times [2021-06-05 05:16:16,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:16,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538491449] [2021-06-05 05:16:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:16,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:16,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538491449] [2021-06-05 05:16:16,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538491449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:16,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739675265] [2021-06-05 05:16:16,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:16:16,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:16:16,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:16,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:16,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:16,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:16,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:16,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:16,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:16,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:16:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:16,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739675265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:16,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:16,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:16:16,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209813864] [2021-06-05 05:16:16,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:16,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:16,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:16,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:16,888 INFO L87 Difference]: Start difference. First operand 1674 states and 5866 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:18,289 INFO L93 Difference]: Finished difference Result 2284 states and 7716 transitions. [2021-06-05 05:16:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:16:18,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:18,293 INFO L225 Difference]: With dead ends: 2284 [2021-06-05 05:16:18,293 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 05:16:18,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1134.2ms TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:16:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 05:16:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1677. [2021-06-05 05:16:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.5053699284009547) internal successors, (5875), 1676 states have internal predecessors, (5875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5875 transitions. [2021-06-05 05:16:18,316 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5875 transitions. Word has length 24 [2021-06-05 05:16:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:18,316 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5875 transitions. [2021-06-05 05:16:18,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5875 transitions. [2021-06-05 05:16:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:18,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:18,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:18,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2021-06-05 05:16:18,519 INFO L430 AbstractCegarLoop]: === Iteration 190 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:18,519 INFO L82 PathProgramCache]: Analyzing trace with hash -398091348, now seen corresponding path program 76 times [2021-06-05 05:16:18,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:18,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585463462] [2021-06-05 05:16:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:18,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:18,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585463462] [2021-06-05 05:16:18,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585463462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:18,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569145535] [2021-06-05 05:16:18,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:18,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:18,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:18,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:18,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:18,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:18,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:18,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:18,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569145535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:18,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:18,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:18,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737244838] [2021-06-05 05:16:18,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:18,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:18,815 INFO L87 Difference]: Start difference. First operand 1677 states and 5875 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:19,839 INFO L93 Difference]: Finished difference Result 2173 states and 7397 transitions. [2021-06-05 05:16:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:16:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:19,843 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 05:16:19,843 INFO L226 Difference]: Without dead ends: 2143 [2021-06-05 05:16:19,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 820.8ms TimeCoverageRelationStatistics Valid=354, Invalid=1808, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:16:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-05 05:16:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1679. [2021-06-05 05:16:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.505363528009535) internal successors, (5882), 1678 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5882 transitions. [2021-06-05 05:16:19,863 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5882 transitions. Word has length 24 [2021-06-05 05:16:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:19,863 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 5882 transitions. [2021-06-05 05:16:19,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5882 transitions. [2021-06-05 05:16:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:19,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:19,865 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:20,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:20,065 INFO L430 AbstractCegarLoop]: === Iteration 191 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:20,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1231829788, now seen corresponding path program 77 times [2021-06-05 05:16:20,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:20,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195688274] [2021-06-05 05:16:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:20,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:20,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195688274] [2021-06-05 05:16:20,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195688274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:20,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057321845] [2021-06-05 05:16:20,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:20,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:16:20,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:20,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:20,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:20,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:20,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:20,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:20,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:20,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057321845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:20,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:20,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:20,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529488833] [2021-06-05 05:16:20,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:20,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:20,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:20,376 INFO L87 Difference]: Start difference. First operand 1679 states and 5882 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:21,306 INFO L93 Difference]: Finished difference Result 2149 states and 7324 transitions. [2021-06-05 05:16:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:16:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:21,310 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 05:16:21,310 INFO L226 Difference]: Without dead ends: 2123 [2021-06-05 05:16:21,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 729.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:16:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-06-05 05:16:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1671. [2021-06-05 05:16:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.507185628742515) internal successors, (5857), 1670 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5857 transitions. [2021-06-05 05:16:21,330 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5857 transitions. Word has length 24 [2021-06-05 05:16:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:21,330 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5857 transitions. [2021-06-05 05:16:21,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5857 transitions. [2021-06-05 05:16:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:21,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:21,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:21,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:21,533 INFO L430 AbstractCegarLoop]: === Iteration 192 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:21,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1241517520, now seen corresponding path program 80 times [2021-06-05 05:16:21,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:21,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649066532] [2021-06-05 05:16:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:21,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:21,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649066532] [2021-06-05 05:16:21,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649066532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:21,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281404450] [2021-06-05 05:16:21,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:21,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:21,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:21,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:21,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:21,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:21,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:21,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:21,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:21,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:16:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:21,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281404450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:21,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:21,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:16:21,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233668737] [2021-06-05 05:16:21,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:21,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:21,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:21,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:21,971 INFO L87 Difference]: Start difference. First operand 1671 states and 5857 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:23,319 INFO L93 Difference]: Finished difference Result 2325 states and 7797 transitions. [2021-06-05 05:16:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:16:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:23,323 INFO L225 Difference]: With dead ends: 2325 [2021-06-05 05:16:23,323 INFO L226 Difference]: Without dead ends: 2275 [2021-06-05 05:16:23,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1104.0ms TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:16:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-06-05 05:16:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1674. [2021-06-05 05:16:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.5068738792588166) internal successors, (5867), 1673 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5867 transitions. [2021-06-05 05:16:23,348 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5867 transitions. Word has length 24 [2021-06-05 05:16:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:23,348 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5867 transitions. [2021-06-05 05:16:23,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5867 transitions. [2021-06-05 05:16:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:23,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:23,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:23,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 05:16:23,553 INFO L430 AbstractCegarLoop]: === Iteration 193 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1324778030, now seen corresponding path program 81 times [2021-06-05 05:16:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:23,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85651054] [2021-06-05 05:16:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:23,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:23,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85651054] [2021-06-05 05:16:23,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85651054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:23,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822764900] [2021-06-05 05:16:23,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:23,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:16:23,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:23,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:23,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:23,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:23,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:16:23,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:23,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:23,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:23,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:16:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:23,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822764900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:23,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:23,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:16:23,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422031727] [2021-06-05 05:16:23,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:23,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:23,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:23,971 INFO L87 Difference]: Start difference. First operand 1674 states and 5867 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:26,233 INFO L93 Difference]: Finished difference Result 2304 states and 7763 transitions. [2021-06-05 05:16:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:16:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:26,237 INFO L225 Difference]: With dead ends: 2304 [2021-06-05 05:16:26,237 INFO L226 Difference]: Without dead ends: 2265 [2021-06-05 05:16:26,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1922.2ms TimeCoverageRelationStatistics Valid=579, Invalid=3327, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:16:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-06-05 05:16:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1677. [2021-06-05 05:16:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.506563245823389) internal successors, (5877), 1676 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5877 transitions. [2021-06-05 05:16:26,261 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5877 transitions. Word has length 24 [2021-06-05 05:16:26,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:26,261 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5877 transitions. [2021-06-05 05:16:26,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:26,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5877 transitions. [2021-06-05 05:16:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:26,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:26,263 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:26,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:26,464 INFO L430 AbstractCegarLoop]: === Iteration 194 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:26,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1942039406, now seen corresponding path program 82 times [2021-06-05 05:16:26,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:26,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877422262] [2021-06-05 05:16:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:26,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:26,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877422262] [2021-06-05 05:16:26,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877422262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:26,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50799568] [2021-06-05 05:16:26,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:26,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:26,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:26,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:26,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:26,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:26,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:26,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:26,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:26,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50799568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:26,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:26,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:26,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601212640] [2021-06-05 05:16:26,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:26,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:26,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:26,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:26,770 INFO L87 Difference]: Start difference. First operand 1677 states and 5877 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:27,750 INFO L93 Difference]: Finished difference Result 2148 states and 7323 transitions. [2021-06-05 05:16:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:16:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:27,754 INFO L225 Difference]: With dead ends: 2148 [2021-06-05 05:16:27,754 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 05:16:27,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 817.2ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:16:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 05:16:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1680. [2021-06-05 05:16:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5050625372245383) internal successors, (5885), 1679 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5885 transitions. [2021-06-05 05:16:27,774 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5885 transitions. Word has length 24 [2021-06-05 05:16:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:27,774 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5885 transitions. [2021-06-05 05:16:27,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5885 transitions. [2021-06-05 05:16:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:27,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:27,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:27,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 05:16:27,977 INFO L430 AbstractCegarLoop]: === Iteration 195 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2029341712, now seen corresponding path program 83 times [2021-06-05 05:16:27,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:27,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557309954] [2021-06-05 05:16:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:28,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557309954] [2021-06-05 05:16:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557309954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236254078] [2021-06-05 05:16:28,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:28,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:28,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:28,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:28,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:28,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:28,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:28,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:28,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:28,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236254078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:28,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:28,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:28,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762796550] [2021-06-05 05:16:28,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:28,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:28,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:28,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:28,327 INFO L87 Difference]: Start difference. First operand 1680 states and 5885 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:29,162 INFO L93 Difference]: Finished difference Result 2123 states and 7249 transitions. [2021-06-05 05:16:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:16:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:29,166 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 05:16:29,166 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 05:16:29,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 713.8ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:16:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 05:16:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1671. [2021-06-05 05:16:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.507185628742515) internal successors, (5857), 1670 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5857 transitions. [2021-06-05 05:16:29,186 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5857 transitions. Word has length 24 [2021-06-05 05:16:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:29,186 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5857 transitions. [2021-06-05 05:16:29,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5857 transitions. [2021-06-05 05:16:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:29,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:29,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:29,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 05:16:29,389 INFO L430 AbstractCegarLoop]: === Iteration 196 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash -738169602, now seen corresponding path program 78 times [2021-06-05 05:16:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076472990] [2021-06-05 05:16:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:29,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:29,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076472990] [2021-06-05 05:16:29,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076472990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:29,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999250238] [2021-06-05 05:16:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:29,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:16:29,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:29,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:29,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:29,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:29,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 05:16:29,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:29,760 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-05 05:16:29,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:29,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 05:16:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:29,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999250238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:29,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:29,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:16:29,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515110712] [2021-06-05 05:16:29,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:16:29,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:29,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:16:29,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:29,827 INFO L87 Difference]: Start difference. First operand 1671 states and 5857 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:31,680 INFO L93 Difference]: Finished difference Result 2486 states and 8299 transitions. [2021-06-05 05:16:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:16:31,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:31,684 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 05:16:31,684 INFO L226 Difference]: Without dead ends: 2396 [2021-06-05 05:16:31,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1398.0ms TimeCoverageRelationStatistics Valid=418, Invalid=2774, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:16:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-05 05:16:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1686. [2021-06-05 05:16:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.5050445103857566) internal successors, (5906), 1685 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5906 transitions. [2021-06-05 05:16:31,707 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5906 transitions. Word has length 24 [2021-06-05 05:16:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:31,707 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5906 transitions. [2021-06-05 05:16:31,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5906 transitions. [2021-06-05 05:16:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:31,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:31,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:31,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 05:16:31,909 INFO L430 AbstractCegarLoop]: === Iteration 197 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:31,909 INFO L82 PathProgramCache]: Analyzing trace with hash -520744716, now seen corresponding path program 79 times [2021-06-05 05:16:31,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:31,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412960843] [2021-06-05 05:16:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:32,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:32,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412960843] [2021-06-05 05:16:32,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412960843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:32,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912821109] [2021-06-05 05:16:32,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:32,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:32,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:32,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:32,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:32,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:32,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:32,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:32,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912821109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:32,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:32,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:32,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468589956] [2021-06-05 05:16:32,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:32,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:32,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:32,207 INFO L87 Difference]: Start difference. First operand 1686 states and 5906 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:33,883 INFO L93 Difference]: Finished difference Result 2547 states and 8513 transitions. [2021-06-05 05:16:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:16:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:33,887 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 05:16:33,887 INFO L226 Difference]: Without dead ends: 2487 [2021-06-05 05:16:33,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1365.6ms TimeCoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:16:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-05 05:16:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1726. [2021-06-05 05:16:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 3.508985507246377) internal successors, (6053), 1725 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 6053 transitions. [2021-06-05 05:16:33,909 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 6053 transitions. Word has length 24 [2021-06-05 05:16:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:33,909 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 6053 transitions. [2021-06-05 05:16:33,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 6053 transitions. [2021-06-05 05:16:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:33,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:33,912 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:34,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:34,112 INFO L430 AbstractCegarLoop]: === Iteration 198 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:34,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1354483156, now seen corresponding path program 80 times [2021-06-05 05:16:34,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:34,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748454375] [2021-06-05 05:16:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:34,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:34,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748454375] [2021-06-05 05:16:34,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748454375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:34,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906439566] [2021-06-05 05:16:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:34,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:34,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:34,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:34,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:16:34,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:34,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:34,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:34,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:16:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:34,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906439566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:34,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:34,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:16:34,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044312911] [2021-06-05 05:16:34,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:34,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:34,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:34,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:34,491 INFO L87 Difference]: Start difference. First operand 1726 states and 6053 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:36,177 INFO L93 Difference]: Finished difference Result 2452 states and 8252 transitions. [2021-06-05 05:16:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:16:36,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:36,180 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 05:16:36,180 INFO L226 Difference]: Without dead ends: 2401 [2021-06-05 05:16:36,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1467.0ms TimeCoverageRelationStatistics Valid=551, Invalid=2989, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:16:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-06-05 05:16:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 1748. [2021-06-05 05:16:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.5060103033772183) internal successors, (6125), 1747 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 6125 transitions. [2021-06-05 05:16:36,203 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 6125 transitions. Word has length 24 [2021-06-05 05:16:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:36,204 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 6125 transitions. [2021-06-05 05:16:36,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 6125 transitions. [2021-06-05 05:16:36,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:36,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:36,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:36,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:36,406 INFO L430 AbstractCegarLoop]: === Iteration 199 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:36,407 INFO L82 PathProgramCache]: Analyzing trace with hash -96000760, now seen corresponding path program 84 times [2021-06-05 05:16:36,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:36,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416246437] [2021-06-05 05:16:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:36,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:36,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416246437] [2021-06-05 05:16:36,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416246437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:36,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921684696] [2021-06-05 05:16:36,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:36,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:16:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:36,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:36,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:36,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:36,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:36,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:36,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:36,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:16:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:36,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921684696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:36,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:36,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:16:36,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37514601] [2021-06-05 05:16:36,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:36,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:36,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:36,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:36,822 INFO L87 Difference]: Start difference. First operand 1748 states and 6125 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:39,055 INFO L93 Difference]: Finished difference Result 2604 states and 8741 transitions. [2021-06-05 05:16:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:16:39,055 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:39,059 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 05:16:39,059 INFO L226 Difference]: Without dead ends: 2546 [2021-06-05 05:16:39,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1794.5ms TimeCoverageRelationStatistics Valid=752, Invalid=3940, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:16:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-05 05:16:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1755. [2021-06-05 05:16:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 3.506841505131129) internal successors, (6151), 1754 states have internal predecessors, (6151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 6151 transitions. [2021-06-05 05:16:39,083 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 6151 transitions. Word has length 24 [2021-06-05 05:16:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:39,083 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 6151 transitions. [2021-06-05 05:16:39,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 6151 transitions. [2021-06-05 05:16:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:39,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:39,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:39,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 05:16:39,286 INFO L430 AbstractCegarLoop]: === Iteration 200 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1124150620, now seen corresponding path program 85 times [2021-06-05 05:16:39,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:39,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914244340] [2021-06-05 05:16:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:39,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:39,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914244340] [2021-06-05 05:16:39,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914244340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:39,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971109194] [2021-06-05 05:16:39,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:39,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:39,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:39,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:39,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:39,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:39,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:39,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971109194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:39,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:39,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:39,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999111482] [2021-06-05 05:16:39,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:39,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:39,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:39,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:39,580 INFO L87 Difference]: Start difference. First operand 1755 states and 6151 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:41,079 INFO L93 Difference]: Finished difference Result 2476 states and 8372 transitions. [2021-06-05 05:16:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:16:41,080 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:41,083 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 05:16:41,083 INFO L226 Difference]: Without dead ends: 2434 [2021-06-05 05:16:41,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1258.5ms TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:16:41,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-06-05 05:16:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1765. [2021-06-05 05:16:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 3.5051020408163267) internal successors, (6183), 1764 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 6183 transitions. [2021-06-05 05:16:41,107 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 6183 transitions. Word has length 24 [2021-06-05 05:16:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:41,107 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 6183 transitions. [2021-06-05 05:16:41,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 6183 transitions. [2021-06-05 05:16:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:41,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:41,110 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:41,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 05:16:41,310 INFO L430 AbstractCegarLoop]: === Iteration 201 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:41,310 INFO L82 PathProgramCache]: Analyzing trace with hash -800564442, now seen corresponding path program 86 times [2021-06-05 05:16:41,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:41,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656273680] [2021-06-05 05:16:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:41,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:41,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656273680] [2021-06-05 05:16:41,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656273680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:41,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860567405] [2021-06-05 05:16:41,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:41,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:41,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:41,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:16:41,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:41,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:41,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:16:41,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:41,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:41,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:41,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:16:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:41,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860567405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:41,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:41,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:16:41,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467021388] [2021-06-05 05:16:41,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:41,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:41,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:41,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:41,685 INFO L87 Difference]: Start difference. First operand 1765 states and 6183 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:43,678 INFO L93 Difference]: Finished difference Result 2476 states and 8307 transitions. [2021-06-05 05:16:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:16:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:43,682 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 05:16:43,682 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 05:16:43,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1687.9ms TimeCoverageRelationStatistics Valid=639, Invalid=3393, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:16:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 05:16:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1773. [2021-06-05 05:16:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 3.505079006772009) internal successors, (6211), 1772 states have internal predecessors, (6211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 6211 transitions. [2021-06-05 05:16:43,705 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 6211 transitions. Word has length 24 [2021-06-05 05:16:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:43,705 INFO L482 AbstractCegarLoop]: Abstraction has 1773 states and 6211 transitions. [2021-06-05 05:16:43,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 6211 transitions. [2021-06-05 05:16:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:43,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:43,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:43,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 05:16:43,907 INFO L430 AbstractCegarLoop]: === Iteration 202 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:43,908 INFO L82 PathProgramCache]: Analyzing trace with hash 885179680, now seen corresponding path program 87 times [2021-06-05 05:16:43,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:43,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149342360] [2021-06-05 05:16:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:44,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:44,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149342360] [2021-06-05 05:16:44,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149342360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:44,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274522638] [2021-06-05 05:16:44,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:44,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:16:44,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:44,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:44,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:44,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:44,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:44,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:44,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:44,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:44,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274522638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:44,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:44,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:16:44,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205228571] [2021-06-05 05:16:44,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:16:44,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:44,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:16:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:16:44,215 INFO L87 Difference]: Start difference. First operand 1773 states and 6211 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:45,520 INFO L93 Difference]: Finished difference Result 2331 states and 7931 transitions. [2021-06-05 05:16:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:16:45,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:45,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:45,523 INFO L225 Difference]: With dead ends: 2331 [2021-06-05 05:16:45,523 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 05:16:45,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1060.8ms TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:16:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 05:16:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1760. [2021-06-05 05:16:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 3.505969300739056) internal successors, (6167), 1759 states have internal predecessors, (6167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 6167 transitions. [2021-06-05 05:16:45,545 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 6167 transitions. Word has length 24 [2021-06-05 05:16:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:45,545 INFO L482 AbstractCegarLoop]: Abstraction has 1760 states and 6167 transitions. [2021-06-05 05:16:45,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 6167 transitions. [2021-06-05 05:16:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:45,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:45,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:45,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 05:16:45,748 INFO L430 AbstractCegarLoop]: === Iteration 203 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1344157466, now seen corresponding path program 81 times [2021-06-05 05:16:45,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:45,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267198163] [2021-06-05 05:16:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:45,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:45,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267198163] [2021-06-05 05:16:45,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267198163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:45,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328776972] [2021-06-05 05:16:45,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:45,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:16:45,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:45,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:16:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:46,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:46,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:46,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 05:16:46,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:46,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:46,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:46,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:350 [2021-06-05 05:16:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:46,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328776972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:46,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:46,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:16:46,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526041177] [2021-06-05 05:16:46,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:46,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:46,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:46,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:46,358 INFO L87 Difference]: Start difference. First operand 1760 states and 6167 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:46,927 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2021-06-05 05:16:47,053 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-06-05 05:16:48,930 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-06-05 05:16:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:49,500 INFO L93 Difference]: Finished difference Result 3383 states and 11252 transitions. [2021-06-05 05:16:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:16:49,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:49,506 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 05:16:49,506 INFO L226 Difference]: Without dead ends: 3356 [2021-06-05 05:16:49,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 2836.3ms TimeCoverageRelationStatistics Valid=1107, Invalid=5373, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:16:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-06-05 05:16:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 1826. [2021-06-05 05:16:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.530958904109589) internal successors, (6444), 1825 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6444 transitions. [2021-06-05 05:16:49,536 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6444 transitions. Word has length 24 [2021-06-05 05:16:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:49,536 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6444 transitions. [2021-06-05 05:16:49,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6444 transitions. [2021-06-05 05:16:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:49,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:49,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:49,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:49,738 INFO L430 AbstractCegarLoop]: === Iteration 204 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:49,739 INFO L82 PathProgramCache]: Analyzing trace with hash -446703708, now seen corresponding path program 82 times [2021-06-05 05:16:49,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:49,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46119381] [2021-06-05 05:16:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:49,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46119381] [2021-06-05 05:16:49,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46119381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006788466] [2021-06-05 05:16:49,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:16:49,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:49,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:50,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:50,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:50,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:50,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:50,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006788466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:50,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:50,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:50,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643923444] [2021-06-05 05:16:50,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:50,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:50,087 INFO L87 Difference]: Start difference. First operand 1826 states and 6444 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:52,219 INFO L93 Difference]: Finished difference Result 3469 states and 11530 transitions. [2021-06-05 05:16:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:16:52,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:52,224 INFO L225 Difference]: With dead ends: 3469 [2021-06-05 05:16:52,224 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 05:16:52,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 1809.4ms TimeCoverageRelationStatistics Valid=1048, Invalid=5432, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:16:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 05:16:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 1859. [2021-06-05 05:16:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 3.5441334768568353) internal successors, (6585), 1858 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 6585 transitions. [2021-06-05 05:16:52,254 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 6585 transitions. Word has length 24 [2021-06-05 05:16:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:52,254 INFO L482 AbstractCegarLoop]: Abstraction has 1859 states and 6585 transitions. [2021-06-05 05:16:52,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:52,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 6585 transitions. [2021-06-05 05:16:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:52,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:52,256 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:52,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:52,457 INFO L430 AbstractCegarLoop]: === Iteration 205 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:52,457 INFO L82 PathProgramCache]: Analyzing trace with hash -713337392, now seen corresponding path program 88 times [2021-06-05 05:16:52,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:52,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366922270] [2021-06-05 05:16:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:52,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:52,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366922270] [2021-06-05 05:16:52,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366922270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:52,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689319289] [2021-06-05 05:16:52,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:52,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:52,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:52,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:52,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:52,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:52,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:52,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:52,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:52,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:52,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689319289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:52,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:52,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:52,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254096962] [2021-06-05 05:16:52,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:52,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:52,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:52,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:52,768 INFO L87 Difference]: Start difference. First operand 1859 states and 6585 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:54,741 INFO L93 Difference]: Finished difference Result 3517 states and 11694 transitions. [2021-06-05 05:16:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:16:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:54,747 INFO L225 Difference]: With dead ends: 3517 [2021-06-05 05:16:54,747 INFO L226 Difference]: Without dead ends: 3467 [2021-06-05 05:16:54,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1597.7ms TimeCoverageRelationStatistics Valid=938, Invalid=4318, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:16:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2021-06-05 05:16:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 1918. [2021-06-05 05:16:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.5701617110067816) internal successors, (6844), 1917 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6844 transitions. [2021-06-05 05:16:54,792 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6844 transitions. Word has length 24 [2021-06-05 05:16:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:54,793 INFO L482 AbstractCegarLoop]: Abstraction has 1918 states and 6844 transitions. [2021-06-05 05:16:54,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6844 transitions. [2021-06-05 05:16:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:54,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:54,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:54,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:54,995 INFO L430 AbstractCegarLoop]: === Iteration 206 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash -389751214, now seen corresponding path program 89 times [2021-06-05 05:16:54,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:54,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723904721] [2021-06-05 05:16:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:55,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:55,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723904721] [2021-06-05 05:16:55,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723904721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:55,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671076866] [2021-06-05 05:16:55,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:55,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:16:55,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:55,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:55,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:16:55,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:55,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:55,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:55,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:16:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:55,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671076866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:55,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:55,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:55,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390092469] [2021-06-05 05:16:55,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:55,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:55,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:55,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:55,297 INFO L87 Difference]: Start difference. First operand 1918 states and 6844 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:57,094 INFO L93 Difference]: Finished difference Result 3345 states and 11284 transitions. [2021-06-05 05:16:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:16:57,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:57,099 INFO L225 Difference]: With dead ends: 3345 [2021-06-05 05:16:57,100 INFO L226 Difference]: Without dead ends: 3302 [2021-06-05 05:16:57,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 1471.1ms TimeCoverageRelationStatistics Valid=813, Invalid=3879, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:16:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-06-05 05:16:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 1924. [2021-06-05 05:16:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.578263130525221) internal successors, (6881), 1923 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 6881 transitions. [2021-06-05 05:16:57,131 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 6881 transitions. Word has length 24 [2021-06-05 05:16:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:57,131 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 6881 transitions. [2021-06-05 05:16:57,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 6881 transitions. [2021-06-05 05:16:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:57,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:57,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:57,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-05 05:16:57,333 INFO L430 AbstractCegarLoop]: === Iteration 207 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:16:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:57,334 INFO L82 PathProgramCache]: Analyzing trace with hash 147171454, now seen corresponding path program 83 times [2021-06-05 05:16:57,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:57,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994757104] [2021-06-05 05:16:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:57,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:57,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994757104] [2021-06-05 05:16:57,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994757104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:57,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031473849] [2021-06-05 05:16:57,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:57,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:16:57,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:57,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:57,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:57,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:57,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:57,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:57,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:16:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:57,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031473849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:57,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:57,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:16:57,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125764066] [2021-06-05 05:16:57,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:57,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:57,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:57,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:57,630 INFO L87 Difference]: Start difference. First operand 1924 states and 6881 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:59,752 INFO L93 Difference]: Finished difference Result 3554 states and 12008 transitions. [2021-06-05 05:16:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:16:59,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:16:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:59,766 INFO L225 Difference]: With dead ends: 3554 [2021-06-05 05:16:59,766 INFO L226 Difference]: Without dead ends: 3506 [2021-06-05 05:16:59,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1675.0ms TimeCoverageRelationStatistics Valid=855, Invalid=3975, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:16:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-06-05 05:16:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 1958. [2021-06-05 05:16:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 3.601430761369443) internal successors, (7048), 1957 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 7048 transitions. [2021-06-05 05:16:59,797 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 7048 transitions. Word has length 24 [2021-06-05 05:16:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:59,797 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 7048 transitions. [2021-06-05 05:16:59,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 7048 transitions. [2021-06-05 05:16:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:16:59,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:59,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:59,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 05:16:59,999 INFO L430 AbstractCegarLoop]: === Iteration 208 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:00,000 INFO L82 PathProgramCache]: Analyzing trace with hash -57746680, now seen corresponding path program 90 times [2021-06-05 05:17:00,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:00,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114548397] [2021-06-05 05:17:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:00,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:00,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114548397] [2021-06-05 05:17:00,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114548397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:00,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568812143] [2021-06-05 05:17:00,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:00,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:00,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:00,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:00,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:00,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:00,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:17:00,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:00,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:00,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:00,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 05:17:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:00,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568812143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:00,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:00,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:17:00,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818246191] [2021-06-05 05:17:00,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:00,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:00,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:00,338 INFO L87 Difference]: Start difference. First operand 1958 states and 7048 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:02,834 INFO L93 Difference]: Finished difference Result 3437 states and 11640 transitions. [2021-06-05 05:17:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:17:02,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:02,840 INFO L225 Difference]: With dead ends: 3437 [2021-06-05 05:17:02,840 INFO L226 Difference]: Without dead ends: 3407 [2021-06-05 05:17:02,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2131.9ms TimeCoverageRelationStatistics Valid=1021, Invalid=4831, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:17:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-06-05 05:17:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 1969. [2021-06-05 05:17:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.608739837398374) internal successors, (7102), 1968 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7102 transitions. [2021-06-05 05:17:02,871 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7102 transitions. Word has length 24 [2021-06-05 05:17:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:02,871 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7102 transitions. [2021-06-05 05:17:02,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7102 transitions. [2021-06-05 05:17:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:02,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:02,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:03,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 05:17:03,073 INFO L430 AbstractCegarLoop]: === Iteration 209 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:03,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1627997442, now seen corresponding path program 91 times [2021-06-05 05:17:03,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:03,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239194030] [2021-06-05 05:17:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:03,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:03,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239194030] [2021-06-05 05:17:03,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239194030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:03,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020683835] [2021-06-05 05:17:03,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:03,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:03,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:03,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:03,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:03,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:03,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020683835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:03,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:03,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:17:03,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337700423] [2021-06-05 05:17:03,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:03,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:03,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:03,357 INFO L87 Difference]: Start difference. First operand 1969 states and 7102 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:05,138 INFO L93 Difference]: Finished difference Result 3267 states and 11097 transitions. [2021-06-05 05:17:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:17:05,138 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:05,143 INFO L225 Difference]: With dead ends: 3267 [2021-06-05 05:17:05,143 INFO L226 Difference]: Without dead ends: 3232 [2021-06-05 05:17:05,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1326.9ms TimeCoverageRelationStatistics Valid=656, Invalid=3004, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:17:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-06-05 05:17:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1969. [2021-06-05 05:17:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.608739837398374) internal successors, (7102), 1968 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7102 transitions. [2021-06-05 05:17:05,173 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7102 transitions. Word has length 24 [2021-06-05 05:17:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:05,173 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7102 transitions. [2021-06-05 05:17:05,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7102 transitions. [2021-06-05 05:17:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:05,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:05,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:05,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 05:17:05,376 INFO L430 AbstractCegarLoop]: === Iteration 210 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:05,376 INFO L82 PathProgramCache]: Analyzing trace with hash -634589398, now seen corresponding path program 92 times [2021-06-05 05:17:05,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:05,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956748859] [2021-06-05 05:17:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:05,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:05,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956748859] [2021-06-05 05:17:05,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956748859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:05,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550672782] [2021-06-05 05:17:05,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:05,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:05,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:05,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:05,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:05,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:05,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:05,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:05,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:05,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:05,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:17:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:05,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550672782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:05,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:05,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:17:05,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634371915] [2021-06-05 05:17:05,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:05,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:05,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:05,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:05,823 INFO L87 Difference]: Start difference. First operand 1969 states and 7102 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:06,664 INFO L93 Difference]: Finished difference Result 2469 states and 8641 transitions. [2021-06-05 05:17:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:17:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:06,668 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 05:17:06,668 INFO L226 Difference]: Without dead ends: 2460 [2021-06-05 05:17:06,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 728.0ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:17:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-05 05:17:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1973. [2021-06-05 05:17:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 3.6080121703853956) internal successors, (7115), 1972 states have internal predecessors, (7115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 7115 transitions. [2021-06-05 05:17:06,693 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 7115 transitions. Word has length 24 [2021-06-05 05:17:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:06,693 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 7115 transitions. [2021-06-05 05:17:06,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 7115 transitions. [2021-06-05 05:17:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:06,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:06,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:06,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:06,896 INFO L430 AbstractCegarLoop]: === Iteration 211 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:06,896 INFO L82 PathProgramCache]: Analyzing trace with hash -844126778, now seen corresponding path program 93 times [2021-06-05 05:17:06,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:06,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350194896] [2021-06-05 05:17:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:07,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:07,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350194896] [2021-06-05 05:17:07,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350194896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:07,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806086040] [2021-06-05 05:17:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:07,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:07,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:07,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:07,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:07,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:07,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:07,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:07,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:07,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806086040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:07,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:07,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:07,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699668523] [2021-06-05 05:17:07,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:07,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:07,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:07,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:07,389 INFO L87 Difference]: Start difference. First operand 1973 states and 7115 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:08,371 INFO L93 Difference]: Finished difference Result 2516 states and 8793 transitions. [2021-06-05 05:17:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:08,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:08,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:08,375 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 05:17:08,375 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 05:17:08,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 889.4ms TimeCoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:17:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 05:17:08,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1976. [2021-06-05 05:17:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 3.607594936708861) internal successors, (7125), 1975 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 7125 transitions. [2021-06-05 05:17:08,400 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 7125 transitions. Word has length 24 [2021-06-05 05:17:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:08,400 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 7125 transitions. [2021-06-05 05:17:08,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 7125 transitions. [2021-06-05 05:17:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:08,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:08,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:08,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 05:17:08,603 INFO L430 AbstractCegarLoop]: === Iteration 212 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash 884544968, now seen corresponding path program 94 times [2021-06-05 05:17:08,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:08,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702565391] [2021-06-05 05:17:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:08,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:08,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702565391] [2021-06-05 05:17:08,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702565391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:08,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821252217] [2021-06-05 05:17:08,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:08,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:08,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:08,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:08,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:08,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:08,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:08,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:17:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:08,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821252217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:08,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:08,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404480983] [2021-06-05 05:17:08,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:08,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:08,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:08,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:08,959 INFO L87 Difference]: Start difference. First operand 1976 states and 7125 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:09,810 INFO L93 Difference]: Finished difference Result 2478 states and 8683 transitions. [2021-06-05 05:17:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:09,810 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:09,813 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 05:17:09,813 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 05:17:09,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 762.6ms TimeCoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:17:09,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 05:17:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1979. [2021-06-05 05:17:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 3.6071789686552074) internal successors, (7135), 1978 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 7135 transitions. [2021-06-05 05:17:09,837 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 7135 transitions. Word has length 24 [2021-06-05 05:17:09,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:09,837 INFO L482 AbstractCegarLoop]: Abstraction has 1979 states and 7135 transitions. [2021-06-05 05:17:09,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 7135 transitions. [2021-06-05 05:17:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:09,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:09,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:10,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:10,040 INFO L430 AbstractCegarLoop]: === Iteration 213 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash -143604892, now seen corresponding path program 95 times [2021-06-05 05:17:10,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:10,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506840563] [2021-06-05 05:17:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:10,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:10,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506840563] [2021-06-05 05:17:10,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506840563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:10,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417145982] [2021-06-05 05:17:10,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:10,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:10,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:10,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:10,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:10,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:10,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:10,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:17:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:10,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417145982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:10,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:10,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:10,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620146323] [2021-06-05 05:17:10,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:10,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:10,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:10,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:10,339 INFO L87 Difference]: Start difference. First operand 1979 states and 7135 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:11,032 INFO L93 Difference]: Finished difference Result 2450 states and 8602 transitions. [2021-06-05 05:17:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:17:11,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:11,036 INFO L225 Difference]: With dead ends: 2450 [2021-06-05 05:17:11,036 INFO L226 Difference]: Without dead ends: 2441 [2021-06-05 05:17:11,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 573.7ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:17:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-06-05 05:17:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 1982. [2021-06-05 05:17:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.606764260474508) internal successors, (7145), 1981 states have internal predecessors, (7145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 7145 transitions. [2021-06-05 05:17:11,061 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 7145 transitions. Word has length 24 [2021-06-05 05:17:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:11,061 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 7145 transitions. [2021-06-05 05:17:11,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 7145 transitions. [2021-06-05 05:17:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:11,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:11,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:11,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:11,265 INFO L430 AbstractCegarLoop]: === Iteration 214 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1865725408, now seen corresponding path program 96 times [2021-06-05 05:17:11,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:11,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406238594] [2021-06-05 05:17:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:11,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:11,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406238594] [2021-06-05 05:17:11,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406238594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:11,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913374665] [2021-06-05 05:17:11,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:11,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:11,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:17:11,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:11,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:11,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:17:11,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:11,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:11,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:17:11,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:118 [2021-06-05 05:17:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:11,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913374665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:11,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:11,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:17:11,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193969661] [2021-06-05 05:17:11,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:11,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:11,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:11,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:11,708 INFO L87 Difference]: Start difference. First operand 1982 states and 7145 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:12,613 INFO L93 Difference]: Finished difference Result 2366 states and 8334 transitions. [2021-06-05 05:17:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:17:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:12,617 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 05:17:12,617 INFO L226 Difference]: Without dead ends: 2353 [2021-06-05 05:17:12,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 822.9ms TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:17:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-05 05:17:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1974. [2021-06-05 05:17:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6097313735428282) internal successors, (7122), 1973 states have internal predecessors, (7122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7122 transitions. [2021-06-05 05:17:12,641 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7122 transitions. Word has length 24 [2021-06-05 05:17:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:12,641 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7122 transitions. [2021-06-05 05:17:12,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7122 transitions. [2021-06-05 05:17:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:12,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:12,643 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:12,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:12,844 INFO L430 AbstractCegarLoop]: === Iteration 215 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:12,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:12,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1334997500, now seen corresponding path program 97 times [2021-06-05 05:17:12,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:12,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867938146] [2021-06-05 05:17:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:12,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:12,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867938146] [2021-06-05 05:17:12,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867938146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:12,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629710460] [2021-06-05 05:17:12,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:13,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:13,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:13,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:17:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:13,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629710460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:13,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:13,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:13,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126549297] [2021-06-05 05:17:13,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:13,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:13,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:13,156 INFO L87 Difference]: Start difference. First operand 1974 states and 7122 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:13,764 INFO L93 Difference]: Finished difference Result 2438 states and 8561 transitions. [2021-06-05 05:17:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:17:13,764 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:13,768 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 05:17:13,768 INFO L226 Difference]: Without dead ends: 2429 [2021-06-05 05:17:13,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:17:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-05 05:17:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1963. [2021-06-05 05:17:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.610091743119266) internal successors, (7083), 1962 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 7083 transitions. [2021-06-05 05:17:13,794 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 7083 transitions. Word has length 24 [2021-06-05 05:17:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:13,794 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 7083 transitions. [2021-06-05 05:17:13,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 7083 transitions. [2021-06-05 05:17:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:13,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:13,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:13,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:13,997 INFO L430 AbstractCegarLoop]: === Iteration 216 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:13,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1948206298, now seen corresponding path program 98 times [2021-06-05 05:17:13,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:13,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847528264] [2021-06-05 05:17:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:14,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847528264] [2021-06-05 05:17:14,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847528264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587925068] [2021-06-05 05:17:14,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:14,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:14,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:14,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:14,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:14,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:14,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:14,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:14,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:14,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:14,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:17:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:14,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587925068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:14,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:14,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:17:14,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434473129] [2021-06-05 05:17:14,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:14,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:14,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:14,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:14,408 INFO L87 Difference]: Start difference. First operand 1963 states and 7083 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:15,208 INFO L93 Difference]: Finished difference Result 2495 states and 8710 transitions. [2021-06-05 05:17:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:15,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:15,212 INFO L225 Difference]: With dead ends: 2495 [2021-06-05 05:17:15,212 INFO L226 Difference]: Without dead ends: 2486 [2021-06-05 05:17:15,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 671.2ms TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:17:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-05 05:17:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1963. [2021-06-05 05:17:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.610091743119266) internal successors, (7083), 1962 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 7083 transitions. [2021-06-05 05:17:15,239 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 7083 transitions. Word has length 24 [2021-06-05 05:17:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:15,239 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 7083 transitions. [2021-06-05 05:17:15,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 7083 transitions. [2021-06-05 05:17:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:15,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:15,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:15,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:15,442 INFO L430 AbstractCegarLoop]: === Iteration 217 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:15,443 INFO L82 PathProgramCache]: Analyzing trace with hash 440124240, now seen corresponding path program 99 times [2021-06-05 05:17:15,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:15,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590786060] [2021-06-05 05:17:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:15,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:15,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590786060] [2021-06-05 05:17:15,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590786060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:15,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537375310] [2021-06-05 05:17:15,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:15,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:15,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:15,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:15,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:15,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:15,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:15,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:15,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:15,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:17:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:15,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537375310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:15,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:15,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:17:15,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188841468] [2021-06-05 05:17:15,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:15,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:15,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:15,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:15,847 INFO L87 Difference]: Start difference. First operand 1963 states and 7083 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:16,692 INFO L93 Difference]: Finished difference Result 2517 states and 8781 transitions. [2021-06-05 05:17:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:17:16,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:16,696 INFO L225 Difference]: With dead ends: 2517 [2021-06-05 05:17:16,696 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 05:17:16,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 671.7ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:17:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 05:17:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1967. [2021-06-05 05:17:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.608850457782299) internal successors, (7095), 1966 states have internal predecessors, (7095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 7095 transitions. [2021-06-05 05:17:16,720 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 7095 transitions. Word has length 24 [2021-06-05 05:17:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:16,720 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 7095 transitions. [2021-06-05 05:17:16,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 7095 transitions. [2021-06-05 05:17:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:16,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:16,723 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:16,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:16,923 INFO L430 AbstractCegarLoop]: === Iteration 218 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1918599544, now seen corresponding path program 100 times [2021-06-05 05:17:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:16,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772106804] [2021-06-05 05:17:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:17,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772106804] [2021-06-05 05:17:17,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772106804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708586925] [2021-06-05 05:17:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:17,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:17,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:17,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:17,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:17,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:17,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:17,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:17,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:17,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708586925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:17,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:17,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:17,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191706348] [2021-06-05 05:17:17,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:17,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:17,286 INFO L87 Difference]: Start difference. First operand 1967 states and 7095 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:18,067 INFO L93 Difference]: Finished difference Result 2507 states and 8780 transitions. [2021-06-05 05:17:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:17:18,068 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:18,072 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 05:17:18,072 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 05:17:18,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 680.8ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:17:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 05:17:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1966. [2021-06-05 05:17:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 3.6106870229007635) internal successors, (7095), 1965 states have internal predecessors, (7095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7095 transitions. [2021-06-05 05:17:18,096 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7095 transitions. Word has length 24 [2021-06-05 05:17:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:18,096 INFO L482 AbstractCegarLoop]: Abstraction has 1966 states and 7095 transitions. [2021-06-05 05:17:18,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7095 transitions. [2021-06-05 05:17:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:18,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:18,099 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:18,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-05 05:17:18,299 INFO L430 AbstractCegarLoop]: === Iteration 219 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2095140976, now seen corresponding path program 101 times [2021-06-05 05:17:18,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:18,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312750169] [2021-06-05 05:17:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:18,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:18,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312750169] [2021-06-05 05:17:18,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312750169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:18,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420958001] [2021-06-05 05:17:18,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:18,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:18,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:18,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:18,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:18,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:18,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:18,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:17:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:18,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420958001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:18,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:18,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:18,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421064203] [2021-06-05 05:17:18,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:18,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:18,642 INFO L87 Difference]: Start difference. First operand 1966 states and 7095 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:19,445 INFO L93 Difference]: Finished difference Result 2493 states and 8734 transitions. [2021-06-05 05:17:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:17:19,445 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:19,449 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 05:17:19,449 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 05:17:19,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 693.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:17:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 05:17:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1969. [2021-06-05 05:17:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.609247967479675) internal successors, (7103), 1968 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7103 transitions. [2021-06-05 05:17:19,474 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7103 transitions. Word has length 24 [2021-06-05 05:17:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:19,474 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7103 transitions. [2021-06-05 05:17:19,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7103 transitions. [2021-06-05 05:17:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:19,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:19,477 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:19,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 05:17:19,677 INFO L430 AbstractCegarLoop]: === Iteration 220 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1366087880, now seen corresponding path program 102 times [2021-06-05 05:17:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:19,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050142103] [2021-06-05 05:17:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:19,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:19,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050142103] [2021-06-05 05:17:19,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050142103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:19,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321856459] [2021-06-05 05:17:19,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:19,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:19,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:19,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:19,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:19,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:17:19,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:19,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:19,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:19,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:17:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:20,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321856459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:20,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:20,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:17:20,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507254083] [2021-06-05 05:17:20,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:20,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:20,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:20,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:20,050 INFO L87 Difference]: Start difference. First operand 1969 states and 7103 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:21,186 INFO L93 Difference]: Finished difference Result 2601 states and 8996 transitions. [2021-06-05 05:17:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:17:21,186 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:21,191 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 05:17:21,191 INFO L226 Difference]: Without dead ends: 2582 [2021-06-05 05:17:21,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1015.4ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:17:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-06-05 05:17:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1974. [2021-06-05 05:17:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6117587430309173) internal successors, (7126), 1973 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7126 transitions. [2021-06-05 05:17:21,217 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7126 transitions. Word has length 24 [2021-06-05 05:17:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:21,217 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7126 transitions. [2021-06-05 05:17:21,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7126 transitions. [2021-06-05 05:17:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:21,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:21,219 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:21,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 05:17:21,420 INFO L430 AbstractCegarLoop]: === Iteration 221 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:21,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2147045616, now seen corresponding path program 103 times [2021-06-05 05:17:21,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:21,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326728143] [2021-06-05 05:17:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:21,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326728143] [2021-06-05 05:17:21,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326728143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:21,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571971651] [2021-06-05 05:17:21,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:21,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:21,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:21,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:21,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:21,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:21,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:17:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:21,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571971651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:21,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:21,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:17:21,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247632838] [2021-06-05 05:17:21,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:21,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:21,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:21,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:21,721 INFO L87 Difference]: Start difference. First operand 1974 states and 7126 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:22,479 INFO L93 Difference]: Finished difference Result 2447 states and 8580 transitions. [2021-06-05 05:17:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:17:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:22,483 INFO L225 Difference]: With dead ends: 2447 [2021-06-05 05:17:22,483 INFO L226 Difference]: Without dead ends: 2437 [2021-06-05 05:17:22,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 646.9ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:17:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-06-05 05:17:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1970. [2021-06-05 05:17:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 3.612493651599797) internal successors, (7113), 1969 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 7113 transitions. [2021-06-05 05:17:22,507 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 7113 transitions. Word has length 24 [2021-06-05 05:17:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:22,507 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 7113 transitions. [2021-06-05 05:17:22,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 7113 transitions. [2021-06-05 05:17:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:22,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:22,510 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:22,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 05:17:22,710 INFO L430 AbstractCegarLoop]: === Iteration 222 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1479020142, now seen corresponding path program 104 times [2021-06-05 05:17:22,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:22,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415624180] [2021-06-05 05:17:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:22,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:22,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415624180] [2021-06-05 05:17:22,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415624180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:22,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087467327] [2021-06-05 05:17:22,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:22,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:22,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:22,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:22,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:23,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:23,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:17:23,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:23,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:23,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:23,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:17:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:23,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087467327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:23,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:23,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:17:23,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139531223] [2021-06-05 05:17:23,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:23,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:23,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:23,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:23,146 INFO L87 Difference]: Start difference. First operand 1970 states and 7113 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:24,451 INFO L93 Difference]: Finished difference Result 2518 states and 8787 transitions. [2021-06-05 05:17:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:17:24,451 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:24,455 INFO L225 Difference]: With dead ends: 2518 [2021-06-05 05:17:24,455 INFO L226 Difference]: Without dead ends: 2499 [2021-06-05 05:17:24,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1239.3ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:17:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-06-05 05:17:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1974. [2021-06-05 05:17:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6122655854029397) internal successors, (7127), 1973 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-05 05:17:24,480 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-05 05:17:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:24,480 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-05 05:17:24,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-05 05:17:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:24,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:24,483 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:24,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:24,684 INFO L430 AbstractCegarLoop]: === Iteration 223 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1787797294, now seen corresponding path program 105 times [2021-06-05 05:17:24,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:24,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779292962] [2021-06-05 05:17:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:24,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:24,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779292962] [2021-06-05 05:17:24,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779292962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:24,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642869551] [2021-06-05 05:17:24,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:24,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:17:24,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:24,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:24,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:17:24,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:24,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:24,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:24,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:17:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:25,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642869551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:25,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:25,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:17:25,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579177517] [2021-06-05 05:17:25,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:25,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:25,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:25,067 INFO L87 Difference]: Start difference. First operand 1974 states and 7127 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:26,113 INFO L93 Difference]: Finished difference Result 2444 states and 8570 transitions. [2021-06-05 05:17:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:17:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:26,116 INFO L225 Difference]: With dead ends: 2444 [2021-06-05 05:17:26,116 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 05:17:26,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 927.0ms TimeCoverageRelationStatistics Valid=384, Invalid=1686, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:17:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 05:17:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1979. [2021-06-05 05:17:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 3.6122345803842264) internal successors, (7145), 1978 states have internal predecessors, (7145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 7145 transitions. [2021-06-05 05:17:26,141 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 7145 transitions. Word has length 24 [2021-06-05 05:17:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:26,141 INFO L482 AbstractCegarLoop]: Abstraction has 1979 states and 7145 transitions. [2021-06-05 05:17:26,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 7145 transitions. [2021-06-05 05:17:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:26,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:26,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:26,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:26,344 INFO L430 AbstractCegarLoop]: === Iteration 224 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2111383472, now seen corresponding path program 106 times [2021-06-05 05:17:26,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:26,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152104933] [2021-06-05 05:17:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:26,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:26,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152104933] [2021-06-05 05:17:26,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152104933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:26,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809795575] [2021-06-05 05:17:26,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:26,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:26,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:26,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:26,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:26,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:26,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:26,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:26,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:17:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:26,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809795575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:26,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:26,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:26,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247548349] [2021-06-05 05:17:26,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:26,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:26,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:26,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:26,649 INFO L87 Difference]: Start difference. First operand 1979 states and 7145 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:27,309 INFO L93 Difference]: Finished difference Result 2401 states and 8472 transitions. [2021-06-05 05:17:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:17:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:27,313 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 05:17:27,313 INFO L226 Difference]: Without dead ends: 2388 [2021-06-05 05:17:27,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:17:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-06-05 05:17:27,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1974. [2021-06-05 05:17:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6122655854029397) internal successors, (7127), 1973 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-05 05:17:27,338 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-05 05:17:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:27,338 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-05 05:17:27,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-05 05:17:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:27,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:27,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:27,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:27,541 INFO L430 AbstractCegarLoop]: === Iteration 225 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:27,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:27,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1365890042, now seen corresponding path program 107 times [2021-06-05 05:17:27,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:27,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121385788] [2021-06-05 05:17:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:27,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:27,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121385788] [2021-06-05 05:17:27,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121385788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:27,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871983190] [2021-06-05 05:17:27,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:27,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:27,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:27,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:27,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:27,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:27,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:27,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:27,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871983190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:27,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:27,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:27,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309152185] [2021-06-05 05:17:27,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:27,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:27,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:27,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:27,884 INFO L87 Difference]: Start difference. First operand 1974 states and 7127 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:28,831 INFO L93 Difference]: Finished difference Result 2538 states and 8840 transitions. [2021-06-05 05:17:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:28,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:28,835 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 05:17:28,835 INFO L226 Difference]: Without dead ends: 2519 [2021-06-05 05:17:28,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 786.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:17:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-05 05:17:28,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1974. [2021-06-05 05:17:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6122655854029397) internal successors, (7127), 1973 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-05 05:17:28,860 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-05 05:17:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:28,860 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-05 05:17:28,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-05 05:17:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:28,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:28,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:29,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 05:17:29,063 INFO L430 AbstractCegarLoop]: === Iteration 226 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash 109929152, now seen corresponding path program 108 times [2021-06-05 05:17:29,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:29,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218797376] [2021-06-05 05:17:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:29,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218797376] [2021-06-05 05:17:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218797376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052873934] [2021-06-05 05:17:29,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:29,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:17:29,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:29,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:17:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:29,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:29,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:29,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:29,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:29,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 05:17:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:29,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052873934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:29,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:29,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:17:29,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23969683] [2021-06-05 05:17:29,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:17:29,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:17:29,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:29,457 INFO L87 Difference]: Start difference. First operand 1974 states and 7127 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:29,951 INFO L93 Difference]: Finished difference Result 2514 states and 8723 transitions. [2021-06-05 05:17:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:17:29,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:29,954 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 05:17:29,954 INFO L226 Difference]: Without dead ends: 2456 [2021-06-05 05:17:29,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:17:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-06-05 05:17:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1983. [2021-06-05 05:17:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.608980827447023) internal successors, (7153), 1982 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 7153 transitions. [2021-06-05 05:17:29,977 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 7153 transitions. Word has length 24 [2021-06-05 05:17:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:29,977 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 7153 transitions. [2021-06-05 05:17:29,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 7153 transitions. [2021-06-05 05:17:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:29,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:29,980 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:30,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 05:17:30,180 INFO L430 AbstractCegarLoop]: === Iteration 227 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:30,180 INFO L82 PathProgramCache]: Analyzing trace with hash 79584234, now seen corresponding path program 109 times [2021-06-05 05:17:30,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:30,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873662493] [2021-06-05 05:17:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:30,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:30,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873662493] [2021-06-05 05:17:30,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873662493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:30,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159283501] [2021-06-05 05:17:30,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:30,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:30,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:30,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:30,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:30,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:30,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:30,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:30,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159283501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:30,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:30,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:30,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990318723] [2021-06-05 05:17:30,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:30,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:30,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:30,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:30,537 INFO L87 Difference]: Start difference. First operand 1983 states and 7153 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:31,341 INFO L93 Difference]: Finished difference Result 2509 states and 8769 transitions. [2021-06-05 05:17:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:17:31,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:31,345 INFO L225 Difference]: With dead ends: 2509 [2021-06-05 05:17:31,345 INFO L226 Difference]: Without dead ends: 2499 [2021-06-05 05:17:31,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 722.2ms TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:17:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-06-05 05:17:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1984. [2021-06-05 05:17:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 3.6091780131114475) internal successors, (7157), 1983 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 7157 transitions. [2021-06-05 05:17:31,369 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 7157 transitions. Word has length 24 [2021-06-05 05:17:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:31,370 INFO L482 AbstractCegarLoop]: Abstraction has 1984 states and 7157 transitions. [2021-06-05 05:17:31,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 7157 transitions. [2021-06-05 05:17:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:31,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:31,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:31,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 05:17:31,572 INFO L430 AbstractCegarLoop]: === Iteration 228 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash -96957198, now seen corresponding path program 110 times [2021-06-05 05:17:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:31,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341001129] [2021-06-05 05:17:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:31,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:31,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341001129] [2021-06-05 05:17:31,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341001129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:31,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438479070] [2021-06-05 05:17:31,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:31,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:31,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:31,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:17:31,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:31,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:31,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:31,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:17:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:31,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438479070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:31,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:31,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:17:31,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430923801] [2021-06-05 05:17:31,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:31,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:31,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:31,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:31,947 INFO L87 Difference]: Start difference. First operand 1984 states and 7157 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:33,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:33,323 INFO L93 Difference]: Finished difference Result 2588 states and 8993 transitions. [2021-06-05 05:17:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:17:33,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:33,327 INFO L225 Difference]: With dead ends: 2588 [2021-06-05 05:17:33,327 INFO L226 Difference]: Without dead ends: 2569 [2021-06-05 05:17:33,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1258.8ms TimeCoverageRelationStatistics Valid=508, Invalid=2462, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:17:33,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-06-05 05:17:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1988. [2021-06-05 05:17:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.610468042274786) internal successors, (7174), 1987 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 7174 transitions. [2021-06-05 05:17:33,361 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 7174 transitions. Word has length 24 [2021-06-05 05:17:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:33,361 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 7174 transitions. [2021-06-05 05:17:33,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 7174 transitions. [2021-06-05 05:17:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:33,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:33,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:33,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 05:17:33,564 INFO L430 AbstractCegarLoop]: === Iteration 229 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:33,564 INFO L82 PathProgramCache]: Analyzing trace with hash -930695638, now seen corresponding path program 111 times [2021-06-05 05:17:33,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:33,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994184965] [2021-06-05 05:17:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:33,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:33,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994184965] [2021-06-05 05:17:33,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994184965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:33,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094056205] [2021-06-05 05:17:33,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:33,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:33,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:33,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:33,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:33,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:33,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:33,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:17:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:33,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094056205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:33,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:33,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:33,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919395753] [2021-06-05 05:17:33,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:33,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:33,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:33,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:33,899 INFO L87 Difference]: Start difference. First operand 1988 states and 7174 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:34,645 INFO L93 Difference]: Finished difference Result 2469 states and 8651 transitions. [2021-06-05 05:17:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:17:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:34,648 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 05:17:34,649 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 05:17:34,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 680.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:17:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 05:17:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1987. [2021-06-05 05:17:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.610271903323263) internal successors, (7170), 1986 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 7170 transitions. [2021-06-05 05:17:34,673 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 7170 transitions. Word has length 24 [2021-06-05 05:17:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:34,673 INFO L482 AbstractCegarLoop]: Abstraction has 1987 states and 7170 transitions. [2021-06-05 05:17:34,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 7170 transitions. [2021-06-05 05:17:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:34,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:34,675 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:34,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:34,876 INFO L430 AbstractCegarLoop]: === Iteration 230 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:34,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1762867562, now seen corresponding path program 112 times [2021-06-05 05:17:34,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:34,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675452298] [2021-06-05 05:17:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:35,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:35,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675452298] [2021-06-05 05:17:35,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675452298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:35,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16580404] [2021-06-05 05:17:35,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:35,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:35,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:35,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:35,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:35,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:35,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:35,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:35,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:35,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16580404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:35,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:35,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:17:35,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471309145] [2021-06-05 05:17:35,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:35,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:35,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:35,227 INFO L87 Difference]: Start difference. First operand 1987 states and 7170 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:36,081 INFO L93 Difference]: Finished difference Result 2492 states and 8720 transitions. [2021-06-05 05:17:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:17:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:36,085 INFO L225 Difference]: With dead ends: 2492 [2021-06-05 05:17:36,086 INFO L226 Difference]: Without dead ends: 2473 [2021-06-05 05:17:36,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 690.2ms TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:17:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-06-05 05:17:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1991. [2021-06-05 05:17:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.6105527638190953) internal successors, (7185), 1990 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 7185 transitions. [2021-06-05 05:17:36,115 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 7185 transitions. Word has length 24 [2021-06-05 05:17:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:36,116 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 7185 transitions. [2021-06-05 05:17:36,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 7185 transitions. [2021-06-05 05:17:36,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:36,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:36,118 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:36,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-05 05:17:36,333 INFO L430 AbstractCegarLoop]: === Iteration 231 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:36,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:36,333 INFO L82 PathProgramCache]: Analyzing trace with hash 734717702, now seen corresponding path program 113 times [2021-06-05 05:17:36,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:36,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667002978] [2021-06-05 05:17:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:36,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:36,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667002978] [2021-06-05 05:17:36,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667002978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:36,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716897040] [2021-06-05 05:17:36,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:36,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:36,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:36,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:36,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:36,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:36,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:36,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:36,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:36,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:17:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:36,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716897040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:36,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:36,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:36,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874114233] [2021-06-05 05:17:36,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:36,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:36,636 INFO L87 Difference]: Start difference. First operand 1991 states and 7185 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:37,322 INFO L93 Difference]: Finished difference Result 2469 states and 8673 transitions. [2021-06-05 05:17:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:17:37,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:37,325 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 05:17:37,325 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 05:17:37,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 595.3ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:17:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 05:17:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1994. [2021-06-05 05:17:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.611138986452584) internal successors, (7197), 1993 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 7197 transitions. [2021-06-05 05:17:37,350 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 7197 transitions. Word has length 24 [2021-06-05 05:17:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:37,350 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 7197 transitions. [2021-06-05 05:17:37,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 7197 transitions. [2021-06-05 05:17:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:37,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:37,352 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:37,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:37,553 INFO L430 AbstractCegarLoop]: === Iteration 232 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:37,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1058303880, now seen corresponding path program 114 times [2021-06-05 05:17:37,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:37,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683440442] [2021-06-05 05:17:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:37,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:37,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683440442] [2021-06-05 05:17:37,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683440442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:37,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929111646] [2021-06-05 05:17:37,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:37,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:17:37,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:37,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:37,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:17:37,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:37,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:37,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:37,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:17:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:37,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929111646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:37,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:37,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:17:37,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562086884] [2021-06-05 05:17:37,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:37,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:37,918 INFO L87 Difference]: Start difference. First operand 1994 states and 7197 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:38,730 INFO L93 Difference]: Finished difference Result 2464 states and 8603 transitions. [2021-06-05 05:17:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:38,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:38,734 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 05:17:38,734 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 05:17:38,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 743.2ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:17:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 05:17:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1998. [2021-06-05 05:17:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 3.6119178768152227) internal successors, (7213), 1997 states have internal predecessors, (7213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 7213 transitions. [2021-06-05 05:17:38,760 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 7213 transitions. Word has length 24 [2021-06-05 05:17:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:38,760 INFO L482 AbstractCegarLoop]: Abstraction has 1998 states and 7213 transitions. [2021-06-05 05:17:38,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 7213 transitions. [2021-06-05 05:17:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:38,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:38,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:38,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:38,969 INFO L430 AbstractCegarLoop]: === Iteration 233 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1550919294, now seen corresponding path program 115 times [2021-06-05 05:17:38,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:38,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045362967] [2021-06-05 05:17:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:39,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:39,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045362967] [2021-06-05 05:17:39,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045362967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:39,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116338157] [2021-06-05 05:17:39,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:39,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:39,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:39,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:39,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:39,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:17:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:39,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116338157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:39,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:39,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:17:39,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713774258] [2021-06-05 05:17:39,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:39,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:39,282 INFO L87 Difference]: Start difference. First operand 1998 states and 7213 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:39,833 INFO L93 Difference]: Finished difference Result 2386 states and 8411 transitions. [2021-06-05 05:17:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:17:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:39,836 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 05:17:39,836 INFO L226 Difference]: Without dead ends: 2373 [2021-06-05 05:17:39,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-06-05 05:17:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1991. [2021-06-05 05:17:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.6105527638190953) internal successors, (7185), 1990 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 7185 transitions. [2021-06-05 05:17:39,860 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 7185 transitions. Word has length 24 [2021-06-05 05:17:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:39,860 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 7185 transitions. [2021-06-05 05:17:39,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 7185 transitions. [2021-06-05 05:17:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:39,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:39,863 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:40,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 05:17:40,063 INFO L430 AbstractCegarLoop]: === Iteration 234 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1912653030, now seen corresponding path program 116 times [2021-06-05 05:17:40,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:40,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154420914] [2021-06-05 05:17:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:40,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:40,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154420914] [2021-06-05 05:17:40,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154420914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:40,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695824848] [2021-06-05 05:17:40,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:40,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:17:40,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:40,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:40,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:40,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:40,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:40,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 05:17:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:40,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695824848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:40,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:40,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:17:40,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292875958] [2021-06-05 05:17:40,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:17:40,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:17:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:40,457 INFO L87 Difference]: Start difference. First operand 1991 states and 7185 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:40,976 INFO L93 Difference]: Finished difference Result 2486 states and 8672 transitions. [2021-06-05 05:17:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:17:40,976 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:40,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:40,980 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 05:17:40,980 INFO L226 Difference]: Without dead ends: 2434 [2021-06-05 05:17:40,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 461.7ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:17:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-06-05 05:17:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1995. [2021-06-05 05:17:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.6093279839518555) internal successors, (7197), 1994 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 7197 transitions. [2021-06-05 05:17:41,004 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 7197 transitions. Word has length 24 [2021-06-05 05:17:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:41,004 INFO L482 AbstractCegarLoop]: Abstraction has 1995 states and 7197 transitions. [2021-06-05 05:17:41,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 7197 transitions. [2021-06-05 05:17:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:41,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:41,006 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:41,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 05:17:41,207 INFO L430 AbstractCegarLoop]: === Iteration 235 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:41,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1695228144, now seen corresponding path program 117 times [2021-06-05 05:17:41,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:41,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843789122] [2021-06-05 05:17:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:41,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:41,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843789122] [2021-06-05 05:17:41,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843789122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:41,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384589539] [2021-06-05 05:17:41,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:41,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:17:41,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:41,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:41,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:41,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:41,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:17:41,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:41,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:41,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:41,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:46 [2021-06-05 05:17:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:41,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384589539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:41,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:41,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:17:41,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796187899] [2021-06-05 05:17:41,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:41,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:41,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:41,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:41,628 INFO L87 Difference]: Start difference. First operand 1995 states and 7197 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:42,630 INFO L93 Difference]: Finished difference Result 2464 states and 8608 transitions. [2021-06-05 05:17:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:17:42,630 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:42,633 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 05:17:42,633 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 05:17:42,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 878.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:17:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 05:17:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2002. [2021-06-05 05:17:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.6081959020489753) internal successors, (7220), 2001 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 7220 transitions. [2021-06-05 05:17:42,657 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 7220 transitions. Word has length 24 [2021-06-05 05:17:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:42,657 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 7220 transitions. [2021-06-05 05:17:42,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 7220 transitions. [2021-06-05 05:17:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:42,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:42,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:42,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 05:17:42,860 INFO L430 AbstractCegarLoop]: === Iteration 236 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1766000712, now seen corresponding path program 118 times [2021-06-05 05:17:42,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:42,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653808590] [2021-06-05 05:17:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:43,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:43,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653808590] [2021-06-05 05:17:43,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653808590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:43,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234731530] [2021-06-05 05:17:43,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:43,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:43,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:43,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:43,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:43,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:43,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:43,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:43,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:17:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:43,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234731530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:43,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:43,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:43,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100277469] [2021-06-05 05:17:43,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:43,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:43,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:43,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:43,166 INFO L87 Difference]: Start difference. First operand 2002 states and 7220 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:43,887 INFO L93 Difference]: Finished difference Result 2479 states and 8688 transitions. [2021-06-05 05:17:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:17:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:43,891 INFO L225 Difference]: With dead ends: 2479 [2021-06-05 05:17:43,891 INFO L226 Difference]: Without dead ends: 2466 [2021-06-05 05:17:43,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 655.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:17:43,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-05 05:17:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2000. [2021-06-05 05:17:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.6088044022011005) internal successors, (7214), 1999 states have internal predecessors, (7214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 7214 transitions. [2021-06-05 05:17:43,916 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 7214 transitions. Word has length 24 [2021-06-05 05:17:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:43,916 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 7214 transitions. [2021-06-05 05:17:43,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 7214 transitions. [2021-06-05 05:17:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:43,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:43,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:44,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:44,119 INFO L430 AbstractCegarLoop]: === Iteration 237 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash 933375312, now seen corresponding path program 119 times [2021-06-05 05:17:44,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:44,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351352553] [2021-06-05 05:17:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:44,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:44,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351352553] [2021-06-05 05:17:44,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351352553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:44,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702668668] [2021-06-05 05:17:44,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:44,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:44,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:44,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:44,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:44,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:44,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:44,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:44,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:44,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:17:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:44,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702668668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:44,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:44,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:44,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806809085] [2021-06-05 05:17:44,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:44,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:44,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:44,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:44,427 INFO L87 Difference]: Start difference. First operand 2000 states and 7214 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:45,101 INFO L93 Difference]: Finished difference Result 2408 states and 8475 transitions. [2021-06-05 05:17:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:17:45,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:45,105 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 05:17:45,105 INFO L226 Difference]: Without dead ends: 2399 [2021-06-05 05:17:45,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:17:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-06-05 05:17:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2002. [2021-06-05 05:17:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.608695652173913) internal successors, (7221), 2001 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 7221 transitions. [2021-06-05 05:17:45,129 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 7221 transitions. Word has length 24 [2021-06-05 05:17:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:45,129 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 7221 transitions. [2021-06-05 05:17:45,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 7221 transitions. [2021-06-05 05:17:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:45,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:45,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:45,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-05 05:17:45,341 INFO L430 AbstractCegarLoop]: === Iteration 238 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1256961490, now seen corresponding path program 120 times [2021-06-05 05:17:45,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:45,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846900175] [2021-06-05 05:17:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:45,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:45,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846900175] [2021-06-05 05:17:45,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846900175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:45,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463867261] [2021-06-05 05:17:45,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:45,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:45,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:45,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:45,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:17:45,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:45,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:45,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:45,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:17:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:45,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463867261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:45,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:45,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:17:45,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810064624] [2021-06-05 05:17:45,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:45,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:45,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:45,703 INFO L87 Difference]: Start difference. First operand 2002 states and 7221 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:46,733 INFO L93 Difference]: Finished difference Result 2501 states and 8707 transitions. [2021-06-05 05:17:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:17:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:46,737 INFO L225 Difference]: With dead ends: 2501 [2021-06-05 05:17:46,737 INFO L226 Difference]: Without dead ends: 2482 [2021-06-05 05:17:46,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 858.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:17:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-06-05 05:17:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 2006. [2021-06-05 05:17:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.6099750623441396) internal successors, (7238), 2005 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7238 transitions. [2021-06-05 05:17:46,765 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7238 transitions. Word has length 24 [2021-06-05 05:17:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:46,765 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 7238 transitions. [2021-06-05 05:17:46,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7238 transitions. [2021-06-05 05:17:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:46,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:46,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:46,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:46,968 INFO L430 AbstractCegarLoop]: === Iteration 239 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:46,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1352261684, now seen corresponding path program 121 times [2021-06-05 05:17:46,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:46,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555010255] [2021-06-05 05:17:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:47,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:47,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555010255] [2021-06-05 05:17:47,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555010255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:47,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271627491] [2021-06-05 05:17:47,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:47,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:47,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:47,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:47,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:47,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:47,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:47,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:17:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271627491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:47,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:47,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:17:47,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975762263] [2021-06-05 05:17:47,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:47,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:47,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:47,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:47,300 INFO L87 Difference]: Start difference. First operand 2006 states and 7238 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:47,915 INFO L93 Difference]: Finished difference Result 2370 states and 8354 transitions. [2021-06-05 05:17:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:17:47,915 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:47,919 INFO L225 Difference]: With dead ends: 2370 [2021-06-05 05:17:47,919 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 05:17:47,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:17:47,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 05:17:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2004. [2021-06-05 05:17:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.6090863704443334) internal successors, (7229), 2003 states have internal predecessors, (7229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 7229 transitions. [2021-06-05 05:17:47,945 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 7229 transitions. Word has length 24 [2021-06-05 05:17:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:47,945 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 7229 transitions. [2021-06-05 05:17:47,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:47,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 7229 transitions. [2021-06-05 05:17:47,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:47,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:47,948 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:48,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 05:17:48,148 INFO L430 AbstractCegarLoop]: === Iteration 240 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:48,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1230452128, now seen corresponding path program 122 times [2021-06-05 05:17:48,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:48,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527154251] [2021-06-05 05:17:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:48,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:48,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527154251] [2021-06-05 05:17:48,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527154251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:48,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361801867] [2021-06-05 05:17:48,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:48,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:48,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:48,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:48,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:48,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:48,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:48,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:48,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:48,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:17:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:48,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361801867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:48,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:48,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:48,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885646863] [2021-06-05 05:17:48,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:48,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:48,451 INFO L87 Difference]: Start difference. First operand 2004 states and 7229 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:49,230 INFO L93 Difference]: Finished difference Result 2441 states and 8576 transitions. [2021-06-05 05:17:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:17:49,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:49,234 INFO L225 Difference]: With dead ends: 2441 [2021-06-05 05:17:49,234 INFO L226 Difference]: Without dead ends: 2432 [2021-06-05 05:17:49,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 584.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:17:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-05 05:17:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2005. [2021-06-05 05:17:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.6092814371257487) internal successors, (7233), 2004 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 7233 transitions. [2021-06-05 05:17:49,261 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 7233 transitions. Word has length 24 [2021-06-05 05:17:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:49,261 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 7233 transitions. [2021-06-05 05:17:49,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 7233 transitions. [2021-06-05 05:17:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:49,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:49,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:49,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 05:17:49,464 INFO L430 AbstractCegarLoop]: === Iteration 241 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash 221424754, now seen corresponding path program 123 times [2021-06-05 05:17:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:49,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752447201] [2021-06-05 05:17:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:49,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:49,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752447201] [2021-06-05 05:17:49,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752447201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:49,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695740406] [2021-06-05 05:17:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:49,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:17:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:17:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:49,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:49,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-06-05 05:17:49,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:49,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:49,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:49,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:1840 [2021-06-05 05:17:50,381 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 58 [2021-06-05 05:17:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:50,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695740406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:50,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:50,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:17:50,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400132850] [2021-06-05 05:17:50,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:50,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:50,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:50,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:50,624 INFO L87 Difference]: Start difference. First operand 2005 states and 7233 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:50,969 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 38 [2021-06-05 05:17:51,593 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 05:17:52,009 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 05:17:52,143 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 05:17:52,297 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 05:17:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:52,528 INFO L93 Difference]: Finished difference Result 2333 states and 8246 transitions. [2021-06-05 05:17:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:17:52,529 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:52,532 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 05:17:52,532 INFO L226 Difference]: Without dead ends: 2323 [2021-06-05 05:17:52,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 2202.2ms TimeCoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:17:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-06-05 05:17:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2007. [2021-06-05 05:17:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 3.610169491525424) internal successors, (7242), 2006 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 7242 transitions. [2021-06-05 05:17:52,556 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 7242 transitions. Word has length 24 [2021-06-05 05:17:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:52,556 INFO L482 AbstractCegarLoop]: Abstraction has 2007 states and 7242 transitions. [2021-06-05 05:17:52,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 7242 transitions. [2021-06-05 05:17:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:52,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:52,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:52,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 05:17:52,759 INFO L430 AbstractCegarLoop]: === Iteration 242 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:52,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1940929934, now seen corresponding path program 124 times [2021-06-05 05:17:52,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:52,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961033322] [2021-06-05 05:17:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:52,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:52,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961033322] [2021-06-05 05:17:52,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961033322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:52,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292276289] [2021-06-05 05:17:52,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:52,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:52,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:52,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:52,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:52,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:52,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:52,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:52,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:52,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:17:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:53,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292276289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:53,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:53,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:53,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665592700] [2021-06-05 05:17:53,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:53,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:53,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:53,048 INFO L87 Difference]: Start difference. First operand 2007 states and 7242 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:53,700 INFO L93 Difference]: Finished difference Result 2425 states and 8523 transitions. [2021-06-05 05:17:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:17:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:53,704 INFO L225 Difference]: With dead ends: 2425 [2021-06-05 05:17:53,704 INFO L226 Difference]: Without dead ends: 2416 [2021-06-05 05:17:53,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:17:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-05 05:17:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2006. [2021-06-05 05:17:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.6099750623441396) internal successors, (7238), 2005 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7238 transitions. [2021-06-05 05:17:53,730 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7238 transitions. Word has length 24 [2021-06-05 05:17:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:53,730 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 7238 transitions. [2021-06-05 05:17:53,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7238 transitions. [2021-06-05 05:17:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:53,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:53,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:53,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-06-05 05:17:53,933 INFO L430 AbstractCegarLoop]: === Iteration 243 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:53,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1166480298, now seen corresponding path program 125 times [2021-06-05 05:17:53,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:53,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672250278] [2021-06-05 05:17:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:54,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672250278] [2021-06-05 05:17:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672250278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816839120] [2021-06-05 05:17:54,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:54,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:17:54,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:54,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:54,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:54,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:54,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:54,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:54,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:17:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:54,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816839120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:54,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:54,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:17:54,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208908048] [2021-06-05 05:17:54,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:54,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:54,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:54,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:54,223 INFO L87 Difference]: Start difference. First operand 2006 states and 7238 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:54,889 INFO L93 Difference]: Finished difference Result 2401 states and 8458 transitions. [2021-06-05 05:17:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:17:54,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:54,892 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 05:17:54,892 INFO L226 Difference]: Without dead ends: 2390 [2021-06-05 05:17:54,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:17:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-06-05 05:17:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2008. [2021-06-05 05:17:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.6093672147483806) internal successors, (7244), 2007 states have internal predecessors, (7244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7244 transitions. [2021-06-05 05:17:54,918 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7244 transitions. Word has length 24 [2021-06-05 05:17:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:54,918 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7244 transitions. [2021-06-05 05:17:54,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7244 transitions. [2021-06-05 05:17:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:54,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:54,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:55,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 05:17:55,125 INFO L430 AbstractCegarLoop]: === Iteration 244 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2145894746, now seen corresponding path program 126 times [2021-06-05 05:17:55,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:55,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468115228] [2021-06-05 05:17:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:55,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:55,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468115228] [2021-06-05 05:17:55,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468115228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:55,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353170859] [2021-06-05 05:17:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:55,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:55,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:17:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:55,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:55,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:17:55,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:55,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:55,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:55,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:17:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:55,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353170859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:55,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:55,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:17:55,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266093496] [2021-06-05 05:17:55,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:55,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:55,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:55,508 INFO L87 Difference]: Start difference. First operand 2008 states and 7244 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:56,563 INFO L93 Difference]: Finished difference Result 2511 states and 8723 transitions. [2021-06-05 05:17:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:17:56,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:56,568 INFO L225 Difference]: With dead ends: 2511 [2021-06-05 05:17:56,568 INFO L226 Difference]: Without dead ends: 2492 [2021-06-05 05:17:56,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 869.0ms TimeCoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:17:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2021-06-05 05:17:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2010. [2021-06-05 05:17:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.6102538576406173) internal successors, (7253), 2009 states have internal predecessors, (7253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7253 transitions. [2021-06-05 05:17:56,594 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7253 transitions. Word has length 24 [2021-06-05 05:17:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:56,594 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 7253 transitions. [2021-06-05 05:17:56,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7253 transitions. [2021-06-05 05:17:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:56,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:56,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:56,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 05:17:56,797 INFO L430 AbstractCegarLoop]: === Iteration 245 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash -428282352, now seen corresponding path program 127 times [2021-06-05 05:17:56,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:56,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929434180] [2021-06-05 05:17:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:56,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:56,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929434180] [2021-06-05 05:17:56,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929434180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:56,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474045461] [2021-06-05 05:17:56,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:56,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:56,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:57,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:17:57,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:57,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:17:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:57,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474045461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:57,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:57,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:17:57,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519206329] [2021-06-05 05:17:57,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:17:57,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:57,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:17:57,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:17:57,096 INFO L87 Difference]: Start difference. First operand 2010 states and 7253 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:57,630 INFO L93 Difference]: Finished difference Result 2354 states and 8315 transitions. [2021-06-05 05:17:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:17:57,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:57,634 INFO L225 Difference]: With dead ends: 2354 [2021-06-05 05:17:57,634 INFO L226 Difference]: Without dead ends: 2344 [2021-06-05 05:17:57,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:17:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-06-05 05:17:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2008. [2021-06-05 05:17:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.610363726955655) internal successors, (7246), 2007 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7246 transitions. [2021-06-05 05:17:57,658 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7246 transitions. Word has length 24 [2021-06-05 05:17:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:57,658 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7246 transitions. [2021-06-05 05:17:57,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:57,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7246 transitions. [2021-06-05 05:17:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:57,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:57,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:57,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:57,861 INFO L430 AbstractCegarLoop]: === Iteration 246 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:17:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:57,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1107281254, now seen corresponding path program 84 times [2021-06-05 05:17:57,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:57,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9449631] [2021-06-05 05:17:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:58,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:58,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9449631] [2021-06-05 05:17:58,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9449631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:58,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299063192] [2021-06-05 05:17:58,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:58,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:17:58,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:58,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:58,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:58,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:58,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 05:17:58,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:17:58,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:58,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:58,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 05:17:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:58,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299063192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:58,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:58,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:17:58,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941736650] [2021-06-05 05:17:58,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:17:58,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:58,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:17:58,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:58,285 INFO L87 Difference]: Start difference. First operand 2008 states and 7246 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:59,944 INFO L93 Difference]: Finished difference Result 2660 states and 9152 transitions. [2021-06-05 05:17:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:17:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:17:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:59,948 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 05:17:59,948 INFO L226 Difference]: Without dead ends: 2590 [2021-06-05 05:17:59,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1279.8ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:17:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-06-05 05:17:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2017. [2021-06-05 05:17:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 3.6086309523809526) internal successors, (7275), 2016 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 7275 transitions. [2021-06-05 05:17:59,973 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 7275 transitions. Word has length 24 [2021-06-05 05:17:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:59,973 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 7275 transitions. [2021-06-05 05:17:59,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 7275 transitions. [2021-06-05 05:17:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:17:59,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:59,975 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:00,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 05:18:00,176 INFO L430 AbstractCegarLoop]: === Iteration 247 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1923388560, now seen corresponding path program 85 times [2021-06-05 05:18:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:00,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283862729] [2021-06-05 05:18:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:00,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:00,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283862729] [2021-06-05 05:18:00,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283862729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:00,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774889587] [2021-06-05 05:18:00,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:00,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:00,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:00,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:00,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:00,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:00,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:00,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:18:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:00,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774889587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:00,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:00,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:18:00,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472512879] [2021-06-05 05:18:00,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:00,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:00,524 INFO L87 Difference]: Start difference. First operand 2017 states and 7275 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:02,139 INFO L93 Difference]: Finished difference Result 2582 states and 8988 transitions. [2021-06-05 05:18:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:18:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:02,143 INFO L225 Difference]: With dead ends: 2582 [2021-06-05 05:18:02,143 INFO L226 Difference]: Without dead ends: 2540 [2021-06-05 05:18:02,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1269.7ms TimeCoverageRelationStatistics Valid=435, Invalid=2535, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:18:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-06-05 05:18:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2020. [2021-06-05 05:18:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.6077265973254087) internal successors, (7284), 2019 states have internal predecessors, (7284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7284 transitions. [2021-06-05 05:18:02,167 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7284 transitions. Word has length 24 [2021-06-05 05:18:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:02,168 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7284 transitions. [2021-06-05 05:18:02,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7284 transitions. [2021-06-05 05:18:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:02,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:02,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:02,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:02,385 INFO L430 AbstractCegarLoop]: === Iteration 248 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2099929992, now seen corresponding path program 86 times [2021-06-05 05:18:02,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:02,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480378700] [2021-06-05 05:18:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:02,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:02,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480378700] [2021-06-05 05:18:02,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480378700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:02,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134436946] [2021-06-05 05:18:02,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:02,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:02,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:02,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:02,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:18:02,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:02,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:02,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:02,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:18:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:02,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134436946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:02,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:02,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:02,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45965741] [2021-06-05 05:18:02,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:02,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:02,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:02,751 INFO L87 Difference]: Start difference. First operand 2020 states and 7284 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:04,325 INFO L93 Difference]: Finished difference Result 2539 states and 8854 transitions. [2021-06-05 05:18:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:18:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:04,329 INFO L225 Difference]: With dead ends: 2539 [2021-06-05 05:18:04,330 INFO L226 Difference]: Without dead ends: 2493 [2021-06-05 05:18:04,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1390.8ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:18:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-06-05 05:18:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2027. [2021-06-05 05:18:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.6076011846001976) internal successors, (7309), 2026 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 7309 transitions. [2021-06-05 05:18:04,355 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 7309 transitions. Word has length 24 [2021-06-05 05:18:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:04,355 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 7309 transitions. [2021-06-05 05:18:04,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 7309 transitions. [2021-06-05 05:18:04,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:04,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:04,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:04,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:04,558 INFO L430 AbstractCegarLoop]: === Iteration 249 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:04,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1361298864, now seen corresponding path program 87 times [2021-06-05 05:18:04,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:04,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206965399] [2021-06-05 05:18:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:04,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:04,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206965399] [2021-06-05 05:18:04,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206965399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:04,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214275481] [2021-06-05 05:18:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:04,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:18:04,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:04,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:04,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:18:04,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:04,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:04,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:04,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:18:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:04,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214275481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:04,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:04,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973660144] [2021-06-05 05:18:04,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:04,991 INFO L87 Difference]: Start difference. First operand 2027 states and 7309 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:06,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:06,467 INFO L93 Difference]: Finished difference Result 2478 states and 8649 transitions. [2021-06-05 05:18:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:18:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:06,471 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 05:18:06,471 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 05:18:06,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1268.5ms TimeCoverageRelationStatistics Valid=374, Invalid=2076, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:18:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 05:18:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2026. [2021-06-05 05:18:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 3.608395061728395) internal successors, (7307), 2025 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 7307 transitions. [2021-06-05 05:18:06,495 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 7307 transitions. Word has length 24 [2021-06-05 05:18:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:06,496 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 7307 transitions. [2021-06-05 05:18:06,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 7307 transitions. [2021-06-05 05:18:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:06,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:06,498 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:06,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:06,698 INFO L430 AbstractCegarLoop]: === Iteration 250 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:06,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2143132664, now seen corresponding path program 88 times [2021-06-05 05:18:06,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:06,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327853107] [2021-06-05 05:18:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:06,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:06,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327853107] [2021-06-05 05:18:06,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327853107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:06,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291061438] [2021-06-05 05:18:06,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:06,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:06,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:06,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:06,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:06,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:06,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:06,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:06,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:06,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:07,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291061438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:07,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:07,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:07,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87877280] [2021-06-05 05:18:07,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:07,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:07,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:07,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:07,024 INFO L87 Difference]: Start difference. First operand 2026 states and 7307 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:08,044 INFO L93 Difference]: Finished difference Result 2424 states and 8516 transitions. [2021-06-05 05:18:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:18:08,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:08,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:08,048 INFO L225 Difference]: With dead ends: 2424 [2021-06-05 05:18:08,048 INFO L226 Difference]: Without dead ends: 2407 [2021-06-05 05:18:08,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 880.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:18:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-05 05:18:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2023. [2021-06-05 05:18:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.609297725024728) internal successors, (7298), 2022 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 7298 transitions. [2021-06-05 05:18:08,071 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 7298 transitions. Word has length 24 [2021-06-05 05:18:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:08,071 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 7298 transitions. [2021-06-05 05:18:08,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 7298 transitions. [2021-06-05 05:18:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:08,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:08,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:08,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:08,277 INFO L430 AbstractCegarLoop]: === Iteration 251 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash -460321124, now seen corresponding path program 128 times [2021-06-05 05:18:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:08,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580406119] [2021-06-05 05:18:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:08,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:08,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580406119] [2021-06-05 05:18:08,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580406119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:08,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074548448] [2021-06-05 05:18:08,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:08,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:08,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:08,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:08,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:08,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:08,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:08,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:08,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:08,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:08,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:18:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:08,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074548448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:08,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:08,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:18:08,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144521078] [2021-06-05 05:18:08,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:08,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:08,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:08,710 INFO L87 Difference]: Start difference. First operand 2023 states and 7298 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:10,204 INFO L93 Difference]: Finished difference Result 2630 states and 9090 transitions. [2021-06-05 05:18:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:18:10,205 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:10,208 INFO L225 Difference]: With dead ends: 2630 [2021-06-05 05:18:10,208 INFO L226 Difference]: Without dead ends: 2580 [2021-06-05 05:18:10,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1241.1ms TimeCoverageRelationStatistics Valid=397, Invalid=2359, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:18:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2021-06-05 05:18:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2026. [2021-06-05 05:18:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 3.608888888888889) internal successors, (7308), 2025 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 7308 transitions. [2021-06-05 05:18:10,233 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 7308 transitions. Word has length 24 [2021-06-05 05:18:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:10,233 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 7308 transitions. [2021-06-05 05:18:10,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 7308 transitions. [2021-06-05 05:18:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:10,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:10,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:10,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 05:18:10,436 INFO L430 AbstractCegarLoop]: === Iteration 252 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:10,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1268350622, now seen corresponding path program 129 times [2021-06-05 05:18:10,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:10,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817504415] [2021-06-05 05:18:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:10,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:10,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817504415] [2021-06-05 05:18:10,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817504415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:10,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179738706] [2021-06-05 05:18:10,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:10,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:18:10,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:10,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:10,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:10,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:18:10,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:10,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:10,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:10,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:18:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:10,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179738706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:10,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:10,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:18:10,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182676790] [2021-06-05 05:18:10,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:10,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:10,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:10,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:10,838 INFO L87 Difference]: Start difference. First operand 2026 states and 7308 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:13,121 INFO L93 Difference]: Finished difference Result 2613 states and 9074 transitions. [2021-06-05 05:18:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:18:13,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:13,125 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 05:18:13,125 INFO L226 Difference]: Without dead ends: 2574 [2021-06-05 05:18:13,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1913.0ms TimeCoverageRelationStatistics Valid=606, Invalid=3554, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:18:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-06-05 05:18:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2029. [2021-06-05 05:18:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 3.608481262327416) internal successors, (7318), 2028 states have internal predecessors, (7318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 7318 transitions. [2021-06-05 05:18:13,151 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 7318 transitions. Word has length 24 [2021-06-05 05:18:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:13,151 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 7318 transitions. [2021-06-05 05:18:13,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 7318 transitions. [2021-06-05 05:18:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:13,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:13,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:13,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:13,354 INFO L430 AbstractCegarLoop]: === Iteration 253 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:13,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:13,354 INFO L82 PathProgramCache]: Analyzing trace with hash 240200762, now seen corresponding path program 130 times [2021-06-05 05:18:13,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:13,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163920494] [2021-06-05 05:18:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:13,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:13,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163920494] [2021-06-05 05:18:13,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163920494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:13,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139168299] [2021-06-05 05:18:13,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:13,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:13,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:13,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:13,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:13,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:13,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:13,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:13,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:13,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139168299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:13,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:13,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:13,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261842664] [2021-06-05 05:18:13,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:13,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:13,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:13,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:13,702 INFO L87 Difference]: Start difference. First operand 2029 states and 7318 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:13,938 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 05:18:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:14,843 INFO L93 Difference]: Finished difference Result 2464 states and 8660 transitions. [2021-06-05 05:18:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:18:14,843 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:14,847 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 05:18:14,847 INFO L226 Difference]: Without dead ends: 2438 [2021-06-05 05:18:14,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1068.5ms TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:18:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-06-05 05:18:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2032. [2021-06-05 05:18:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.6070901033973413) internal successors, (7326), 2031 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7326 transitions. [2021-06-05 05:18:14,870 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7326 transitions. Word has length 24 [2021-06-05 05:18:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:14,870 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 7326 transitions. [2021-06-05 05:18:14,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7326 transitions. [2021-06-05 05:18:14,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:14,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:14,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:15,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:15,073 INFO L430 AbstractCegarLoop]: === Iteration 254 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:15,073 INFO L82 PathProgramCache]: Analyzing trace with hash 563786940, now seen corresponding path program 131 times [2021-06-05 05:18:15,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:15,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823397372] [2021-06-05 05:18:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:15,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:15,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823397372] [2021-06-05 05:18:15,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823397372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:15,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738469925] [2021-06-05 05:18:15,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:15,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:15,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:15,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:15,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:15,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:15,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:15,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:15,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:15,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738469925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:15,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:15,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:15,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014685053] [2021-06-05 05:18:15,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:15,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:15,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:15,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:15,399 INFO L87 Difference]: Start difference. First operand 2032 states and 7326 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:16,438 INFO L93 Difference]: Finished difference Result 2452 states and 8624 transitions. [2021-06-05 05:18:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:18:16,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:16,442 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 05:18:16,442 INFO L226 Difference]: Without dead ends: 2427 [2021-06-05 05:18:16,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 829.8ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:18:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-05 05:18:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2025. [2021-06-05 05:18:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.6096837944664033) internal successors, (7306), 2024 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 7306 transitions. [2021-06-05 05:18:16,470 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 7306 transitions. Word has length 24 [2021-06-05 05:18:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:16,471 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 7306 transitions. [2021-06-05 05:18:16,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 7306 transitions. [2021-06-05 05:18:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:16,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:16,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:16,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-06-05 05:18:16,674 INFO L430 AbstractCegarLoop]: === Iteration 255 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:16,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1854959050, now seen corresponding path program 89 times [2021-06-05 05:18:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:16,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949605527] [2021-06-05 05:18:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:16,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949605527] [2021-06-05 05:18:16,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949605527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273766996] [2021-06-05 05:18:16,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:16,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:18:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:16,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:16,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:16,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:16,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:18:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273766996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:17,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:17,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:18:17,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292502335] [2021-06-05 05:18:17,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:17,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:17,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:17,003 INFO L87 Difference]: Start difference. First operand 2025 states and 7306 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:19,041 INFO L93 Difference]: Finished difference Result 2892 states and 9978 transitions. [2021-06-05 05:18:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:18:19,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:19,054 INFO L225 Difference]: With dead ends: 2892 [2021-06-05 05:18:19,054 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 05:18:19,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1593.8ms TimeCoverageRelationStatistics Valid=585, Invalid=2955, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:18:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 05:18:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2045. [2021-06-05 05:18:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.606164383561644) internal successors, (7371), 2044 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7371 transitions. [2021-06-05 05:18:19,081 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7371 transitions. Word has length 24 [2021-06-05 05:18:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:19,081 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7371 transitions. [2021-06-05 05:18:19,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7371 transitions. [2021-06-05 05:18:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:19,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:19,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:19,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 05:18:19,285 INFO L430 AbstractCegarLoop]: === Iteration 256 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:19,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1238645496, now seen corresponding path program 90 times [2021-06-05 05:18:19,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:19,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583059712] [2021-06-05 05:18:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:19,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:19,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583059712] [2021-06-05 05:18:19,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583059712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:19,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350641369] [2021-06-05 05:18:19,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:19,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:18:19,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:19,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:19,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:19,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:19,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:18:19,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:19,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:19,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:19,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:18:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:19,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350641369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:19,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:19,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:19,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752124107] [2021-06-05 05:18:19,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:19,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:19,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:19,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:19,685 INFO L87 Difference]: Start difference. First operand 2045 states and 7371 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:21,645 INFO L93 Difference]: Finished difference Result 2693 states and 9333 transitions. [2021-06-05 05:18:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:18:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:21,650 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 05:18:21,650 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 05:18:21,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1765.6ms TimeCoverageRelationStatistics Valid=652, Invalid=3380, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:18:21,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 05:18:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2049. [2021-06-05 05:18:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.60546875) internal successors, (7384), 2048 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7384 transitions. [2021-06-05 05:18:21,677 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7384 transitions. Word has length 24 [2021-06-05 05:18:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:21,677 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 7384 transitions. [2021-06-05 05:18:21,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7384 transitions. [2021-06-05 05:18:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:21,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:21,680 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:21,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 05:18:21,885 INFO L430 AbstractCegarLoop]: === Iteration 257 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1797839404, now seen corresponding path program 132 times [2021-06-05 05:18:21,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:21,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186721084] [2021-06-05 05:18:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:22,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186721084] [2021-06-05 05:18:22,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186721084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584786749] [2021-06-05 05:18:22,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:22,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:18:22,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:22,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:22,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:22,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:22,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:22,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:22,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:22,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:22,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:18:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:22,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584786749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:22,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:22,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:18:22,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805779840] [2021-06-05 05:18:22,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:22,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:22,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:22,310 INFO L87 Difference]: Start difference. First operand 2049 states and 7384 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:24,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:24,605 INFO L93 Difference]: Finished difference Result 2862 states and 9855 transitions. [2021-06-05 05:18:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:18:24,606 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:24,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:24,610 INFO L225 Difference]: With dead ends: 2862 [2021-06-05 05:18:24,610 INFO L226 Difference]: Without dead ends: 2804 [2021-06-05 05:18:24,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 1902.0ms TimeCoverageRelationStatistics Valid=732, Invalid=3690, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:18:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-06-05 05:18:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2057. [2021-06-05 05:18:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.6060311284046693) internal successors, (7414), 2056 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 7414 transitions. [2021-06-05 05:18:24,642 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 7414 transitions. Word has length 24 [2021-06-05 05:18:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:24,642 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 7414 transitions. [2021-06-05 05:18:24,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 7414 transitions. [2021-06-05 05:18:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:24,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:24,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:24,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:24,853 INFO L430 AbstractCegarLoop]: === Iteration 258 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1468978032, now seen corresponding path program 133 times [2021-06-05 05:18:24,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:24,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253651527] [2021-06-05 05:18:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:25,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:25,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253651527] [2021-06-05 05:18:25,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253651527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:25,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732019521] [2021-06-05 05:18:25,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:25,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:25,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:25,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:25,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:25,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:25,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:25,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:25,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732019521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:25,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:25,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:25,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650019140] [2021-06-05 05:18:25,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:25,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:25,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:25,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:25,234 INFO L87 Difference]: Start difference. First operand 2057 states and 7414 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:26,845 INFO L93 Difference]: Finished difference Result 2726 states and 9487 transitions. [2021-06-05 05:18:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:18:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:26,849 INFO L225 Difference]: With dead ends: 2726 [2021-06-05 05:18:26,849 INFO L226 Difference]: Without dead ends: 2684 [2021-06-05 05:18:26,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1422.4ms TimeCoverageRelationStatistics Valid=592, Invalid=2600, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:18:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-06-05 05:18:26,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2061. [2021-06-05 05:18:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.6048543689320387) internal successors, (7426), 2060 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7426 transitions. [2021-06-05 05:18:26,876 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7426 transitions. Word has length 24 [2021-06-05 05:18:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:26,876 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7426 transitions. [2021-06-05 05:18:26,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7426 transitions. [2021-06-05 05:18:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:26,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:26,878 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:27,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 05:18:27,079 INFO L430 AbstractCegarLoop]: === Iteration 259 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:27,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1792564210, now seen corresponding path program 134 times [2021-06-05 05:18:27,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:27,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246525644] [2021-06-05 05:18:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:27,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:27,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246525644] [2021-06-05 05:18:27,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246525644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:27,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406963233] [2021-06-05 05:18:27,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:27,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:27,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:27,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:27,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:27,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:18:27,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:27,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:27,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:27,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:18:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:27,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406963233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:27,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:27,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:27,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987763598] [2021-06-05 05:18:27,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:27,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:27,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:27,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:27,458 INFO L87 Difference]: Start difference. First operand 2061 states and 7426 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:29,539 INFO L93 Difference]: Finished difference Result 2706 states and 9360 transitions. [2021-06-05 05:18:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:18:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:29,543 INFO L225 Difference]: With dead ends: 2706 [2021-06-05 05:18:29,544 INFO L226 Difference]: Without dead ends: 2666 [2021-06-05 05:18:29,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1733.2ms TimeCoverageRelationStatistics Valid=645, Invalid=3261, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:18:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-05 05:18:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2069. [2021-06-05 05:18:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 3.604448742746615) internal successors, (7454), 2068 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 7454 transitions. [2021-06-05 05:18:29,570 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 7454 transitions. Word has length 24 [2021-06-05 05:18:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:29,570 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 7454 transitions. [2021-06-05 05:18:29,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 7454 transitions. [2021-06-05 05:18:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:29,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:29,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:29,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:29,773 INFO L430 AbstractCegarLoop]: === Iteration 260 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash -816658964, now seen corresponding path program 135 times [2021-06-05 05:18:29,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:29,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515426291] [2021-06-05 05:18:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:29,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:29,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515426291] [2021-06-05 05:18:29,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515426291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:29,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538865998] [2021-06-05 05:18:29,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:29,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:18:29,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:29,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:29,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:30,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:30,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:30,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:30,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:30,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:30,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538865998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:30,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:30,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:30,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238328537] [2021-06-05 05:18:30,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:30,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:30,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:30,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:30,078 INFO L87 Difference]: Start difference. First operand 2069 states and 7454 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:31,428 INFO L93 Difference]: Finished difference Result 2577 states and 9029 transitions. [2021-06-05 05:18:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:18:31,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:31,432 INFO L225 Difference]: With dead ends: 2577 [2021-06-05 05:18:31,432 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 05:18:31,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1146.7ms TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:18:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 05:18:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2053. [2021-06-05 05:18:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.6062378167641325) internal successors, (7400), 2052 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 7400 transitions. [2021-06-05 05:18:31,461 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 7400 transitions. Word has length 24 [2021-06-05 05:18:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:31,461 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 7400 transitions. [2021-06-05 05:18:31,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 7400 transitions. [2021-06-05 05:18:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:31,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:31,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:31,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:31,664 INFO L430 AbstractCegarLoop]: === Iteration 261 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:31,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:31,664 INFO L82 PathProgramCache]: Analyzing trace with hash -357681178, now seen corresponding path program 91 times [2021-06-05 05:18:31,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:31,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846648164] [2021-06-05 05:18:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:31,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:31,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846648164] [2021-06-05 05:18:31,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846648164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:31,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431255149] [2021-06-05 05:18:31,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:31,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:31,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:31,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:31,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:31,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:31,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:31,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:31,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431255149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:31,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:31,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:31,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323319354] [2021-06-05 05:18:31,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:31,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:31,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:31,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:31,965 INFO L87 Difference]: Start difference. First operand 2053 states and 7400 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:34,309 INFO L93 Difference]: Finished difference Result 3882 states and 12995 transitions. [2021-06-05 05:18:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:18:34,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:34,316 INFO L225 Difference]: With dead ends: 3882 [2021-06-05 05:18:34,316 INFO L226 Difference]: Without dead ends: 3817 [2021-06-05 05:18:34,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 2006.6ms TimeCoverageRelationStatistics Valid=1169, Invalid=4993, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:18:34,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-06-05 05:18:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 2126. [2021-06-05 05:18:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.6291764705882352) internal successors, (7712), 2125 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7712 transitions. [2021-06-05 05:18:34,351 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7712 transitions. Word has length 24 [2021-06-05 05:18:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:34,351 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7712 transitions. [2021-06-05 05:18:34,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7712 transitions. [2021-06-05 05:18:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:34,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:34,353 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:34,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:34,554 INFO L430 AbstractCegarLoop]: === Iteration 262 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:34,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1879791260, now seen corresponding path program 136 times [2021-06-05 05:18:34,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:34,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292238273] [2021-06-05 05:18:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:34,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:34,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292238273] [2021-06-05 05:18:34,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292238273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:34,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198195175] [2021-06-05 05:18:34,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:34,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:34,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:34,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:34,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:34,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:34,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:34,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:34,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:34,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198195175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:34,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:34,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:34,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296726859] [2021-06-05 05:18:34,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:34,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:34,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:34,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:34,924 INFO L87 Difference]: Start difference. First operand 2126 states and 7712 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:37,212 INFO L93 Difference]: Finished difference Result 3896 states and 13187 transitions. [2021-06-05 05:18:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:18:37,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:37,219 INFO L225 Difference]: With dead ends: 3896 [2021-06-05 05:18:37,219 INFO L226 Difference]: Without dead ends: 3835 [2021-06-05 05:18:37,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 1922.1ms TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:18:37,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-06-05 05:18:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 2196. [2021-06-05 05:18:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.655125284738041) internal successors, (8023), 2195 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8023 transitions. [2021-06-05 05:18:37,255 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8023 transitions. Word has length 24 [2021-06-05 05:18:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:37,255 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8023 transitions. [2021-06-05 05:18:37,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8023 transitions. [2021-06-05 05:18:37,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:37,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:37,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:37,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:37,459 INFO L430 AbstractCegarLoop]: === Iteration 263 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:37,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2091589858, now seen corresponding path program 137 times [2021-06-05 05:18:37,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:37,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517559740] [2021-06-05 05:18:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:37,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:37,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517559740] [2021-06-05 05:18:37,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517559740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:37,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663429014] [2021-06-05 05:18:37,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:37,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:18:37,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:37,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:37,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:37,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:37,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:37,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:37,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:37,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:37,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663429014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:37,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:37,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:37,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379195583] [2021-06-05 05:18:37,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:37,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:37,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:37,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:37,758 INFO L87 Difference]: Start difference. First operand 2196 states and 8023 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:39,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:39,884 INFO L93 Difference]: Finished difference Result 3701 states and 12762 transitions. [2021-06-05 05:18:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:18:39,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:39,890 INFO L225 Difference]: With dead ends: 3701 [2021-06-05 05:18:39,890 INFO L226 Difference]: Without dead ends: 3658 [2021-06-05 05:18:39,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 1748.9ms TimeCoverageRelationStatistics Valid=974, Invalid=4428, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:18:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-06-05 05:18:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 2202. [2021-06-05 05:18:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 3.659700136301681) internal successors, (8055), 2201 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 8055 transitions. [2021-06-05 05:18:39,924 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 8055 transitions. Word has length 24 [2021-06-05 05:18:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:39,924 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 8055 transitions. [2021-06-05 05:18:39,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 8055 transitions. [2021-06-05 05:18:39,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:39,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:39,927 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:40,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 05:18:40,127 INFO L430 AbstractCegarLoop]: === Iteration 264 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1554667190, now seen corresponding path program 92 times [2021-06-05 05:18:40,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:40,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172974221] [2021-06-05 05:18:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:40,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:40,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172974221] [2021-06-05 05:18:40,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172974221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:40,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143908970] [2021-06-05 05:18:40,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:40,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:40,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:40,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:40,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:40,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:18:40,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:40,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:40,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:40,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:18:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:40,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143908970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:40,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:40,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:40,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157706068] [2021-06-05 05:18:40,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:40,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:40,471 INFO L87 Difference]: Start difference. First operand 2202 states and 8055 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:42,950 INFO L93 Difference]: Finished difference Result 3738 states and 12902 transitions. [2021-06-05 05:18:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:18:42,950 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:42,956 INFO L225 Difference]: With dead ends: 3738 [2021-06-05 05:18:42,957 INFO L226 Difference]: Without dead ends: 3704 [2021-06-05 05:18:42,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2023.8ms TimeCoverageRelationStatistics Valid=931, Invalid=4619, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:18:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-05 05:18:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 2243. [2021-06-05 05:18:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.68064228367529) internal successors, (8252), 2242 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8252 transitions. [2021-06-05 05:18:43,004 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8252 transitions. Word has length 24 [2021-06-05 05:18:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:43,004 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8252 transitions. [2021-06-05 05:18:43,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8252 transitions. [2021-06-05 05:18:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:43,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:43,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:43,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 05:18:43,207 INFO L430 AbstractCegarLoop]: === Iteration 265 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:43,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1759585324, now seen corresponding path program 138 times [2021-06-05 05:18:43,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:43,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852072614] [2021-06-05 05:18:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:43,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852072614] [2021-06-05 05:18:43,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852072614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:43,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481621645] [2021-06-05 05:18:43,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:43,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:18:43,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:43,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:43,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:18:43,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:43,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:43,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:43,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 05:18:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:43,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481621645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:43,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:43,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:43,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865668386] [2021-06-05 05:18:43,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:43,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:43,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:43,583 INFO L87 Difference]: Start difference. First operand 2243 states and 8252 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:46,351 INFO L93 Difference]: Finished difference Result 3686 states and 12714 transitions. [2021-06-05 05:18:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:18:46,351 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:46,357 INFO L225 Difference]: With dead ends: 3686 [2021-06-05 05:18:46,357 INFO L226 Difference]: Without dead ends: 3656 [2021-06-05 05:18:46,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 2320.1ms TimeCoverageRelationStatistics Valid=1095, Invalid=5067, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:18:46,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-06-05 05:18:46,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 2245. [2021-06-05 05:18:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.679590017825312) internal successors, (8257), 2244 states have internal predecessors, (8257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 8257 transitions. [2021-06-05 05:18:46,392 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 8257 transitions. Word has length 24 [2021-06-05 05:18:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:46,392 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 8257 transitions. [2021-06-05 05:18:46,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 8257 transitions. [2021-06-05 05:18:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:46,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:46,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:46,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable488,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:46,595 INFO L430 AbstractCegarLoop]: === Iteration 266 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:46,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:46,596 INFO L82 PathProgramCache]: Analyzing trace with hash -73841202, now seen corresponding path program 139 times [2021-06-05 05:18:46,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:46,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318214089] [2021-06-05 05:18:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:46,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318214089] [2021-06-05 05:18:46,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318214089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845272968] [2021-06-05 05:18:46,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:46,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:46,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:46,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:46,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:46,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:46,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:46,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:18:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:46,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845272968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:46,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:46,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:18:46,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700808144] [2021-06-05 05:18:46,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:18:46,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:46,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:18:46,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:18:46,929 INFO L87 Difference]: Start difference. First operand 2245 states and 8257 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:48,900 INFO L93 Difference]: Finished difference Result 3537 states and 12238 transitions. [2021-06-05 05:18:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:18:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:48,906 INFO L225 Difference]: With dead ends: 3537 [2021-06-05 05:18:48,907 INFO L226 Difference]: Without dead ends: 3502 [2021-06-05 05:18:48,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 1567.5ms TimeCoverageRelationStatistics Valid=777, Invalid=3383, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:18:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-06-05 05:18:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2223. [2021-06-05 05:18:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 3.6665166516651664) internal successors, (8147), 2222 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 8147 transitions. [2021-06-05 05:18:48,941 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 8147 transitions. Word has length 24 [2021-06-05 05:18:48,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:48,941 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 8147 transitions. [2021-06-05 05:18:48,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 8147 transitions. [2021-06-05 05:18:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:48,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:48,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:49,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:49,144 INFO L430 AbstractCegarLoop]: === Iteration 267 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:49,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1816560186, now seen corresponding path program 140 times [2021-06-05 05:18:49,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:49,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794523768] [2021-06-05 05:18:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:49,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:49,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794523768] [2021-06-05 05:18:49,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794523768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:49,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100565542] [2021-06-05 05:18:49,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:49,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:49,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:49,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:49,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:49,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:49,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:49,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:49,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:49,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:49,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:18:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:49,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100565542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:49,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:49,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:18:49,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151159751] [2021-06-05 05:18:49,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:49,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:49,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:49,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:49,583 INFO L87 Difference]: Start difference. First operand 2223 states and 8147 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:50,732 INFO L93 Difference]: Finished difference Result 2779 states and 9798 transitions. [2021-06-05 05:18:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:18:50,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:50,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:50,736 INFO L225 Difference]: With dead ends: 2779 [2021-06-05 05:18:50,736 INFO L226 Difference]: Without dead ends: 2729 [2021-06-05 05:18:50,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1010.0ms TimeCoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:18:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-05 05:18:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2227. [2021-06-05 05:18:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 3.665768194070081) internal successors, (8160), 2226 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 8160 transitions. [2021-06-05 05:18:50,764 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 8160 transitions. Word has length 24 [2021-06-05 05:18:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:50,764 INFO L482 AbstractCegarLoop]: Abstraction has 2227 states and 8160 transitions. [2021-06-05 05:18:50,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 8160 transitions. [2021-06-05 05:18:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:50,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:50,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:50,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:50,967 INFO L430 AbstractCegarLoop]: === Iteration 268 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash -749735364, now seen corresponding path program 141 times [2021-06-05 05:18:50,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:50,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809360747] [2021-06-05 05:18:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:51,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:51,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809360747] [2021-06-05 05:18:51,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809360747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:51,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284886636] [2021-06-05 05:18:51,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:51,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:18:51,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:51,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:51,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:51,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:51,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:18:51,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:51,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:51,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:51,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:18:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:51,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284886636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:51,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:51,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:18:51,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863513231] [2021-06-05 05:18:51,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:51,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:51,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:51,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:51,389 INFO L87 Difference]: Start difference. First operand 2227 states and 8160 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:51,629 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 05:18:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:53,007 INFO L93 Difference]: Finished difference Result 2773 states and 9806 transitions. [2021-06-05 05:18:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:18:53,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:53,012 INFO L225 Difference]: With dead ends: 2773 [2021-06-05 05:18:53,012 INFO L226 Difference]: Without dead ends: 2737 [2021-06-05 05:18:53,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1406.3ms TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:18:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-06-05 05:18:53,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2230. [2021-06-05 05:18:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.665320771646478) internal successors, (8170), 2229 states have internal predecessors, (8170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 8170 transitions. [2021-06-05 05:18:53,041 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 8170 transitions. Word has length 24 [2021-06-05 05:18:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:53,041 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 8170 transitions. [2021-06-05 05:18:53,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 8170 transitions. [2021-06-05 05:18:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:53,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:53,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:53,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:53,245 INFO L430 AbstractCegarLoop]: === Iteration 269 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1777885224, now seen corresponding path program 142 times [2021-06-05 05:18:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:53,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744731841] [2021-06-05 05:18:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:53,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744731841] [2021-06-05 05:18:53,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744731841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046587695] [2021-06-05 05:18:53,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:53,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:18:53,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:53,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:53,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:53,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:53,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:53,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:53,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:53,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:53,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046587695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:53,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:53,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:53,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640512685] [2021-06-05 05:18:53,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:53,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:53,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:53,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:53,564 INFO L87 Difference]: Start difference. First operand 2230 states and 8170 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:54,430 INFO L93 Difference]: Finished difference Result 2693 states and 9594 transitions. [2021-06-05 05:18:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:18:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:54,434 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 05:18:54,434 INFO L226 Difference]: Without dead ends: 2667 [2021-06-05 05:18:54,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 773.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:18:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-06-05 05:18:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2235. [2021-06-05 05:18:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 3.6638316920322294) internal successors, (8185), 2234 states have internal predecessors, (8185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 8185 transitions. [2021-06-05 05:18:54,462 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 8185 transitions. Word has length 24 [2021-06-05 05:18:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:54,462 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 8185 transitions. [2021-06-05 05:18:54,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 8185 transitions. [2021-06-05 05:18:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:54,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:54,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:54,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 05:18:54,665 INFO L430 AbstractCegarLoop]: === Iteration 270 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1454299046, now seen corresponding path program 143 times [2021-06-05 05:18:54,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:54,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306497583] [2021-06-05 05:18:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:54,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:54,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306497583] [2021-06-05 05:18:54,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306497583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:54,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162587923] [2021-06-05 05:18:54,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:54,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:54,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:54,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:18:54,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:54,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:54,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:54,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:18:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:54,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162587923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:54,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:54,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:18:54,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637515988] [2021-06-05 05:18:54,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:18:54,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:18:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:18:54,983 INFO L87 Difference]: Start difference. First operand 2235 states and 8185 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:55,900 INFO L93 Difference]: Finished difference Result 2644 states and 9457 transitions. [2021-06-05 05:18:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:18:55,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:55,904 INFO L225 Difference]: With dead ends: 2644 [2021-06-05 05:18:55,904 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 05:18:55,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:18:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 05:18:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2228. [2021-06-05 05:18:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 3.666367310282892) internal successors, (8165), 2227 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 8165 transitions. [2021-06-05 05:18:55,930 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 8165 transitions. Word has length 24 [2021-06-05 05:18:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:55,930 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 8165 transitions. [2021-06-05 05:18:55,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 8165 transitions. [2021-06-05 05:18:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:55,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:55,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:56,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 05:18:56,133 INFO L430 AbstractCegarLoop]: === Iteration 271 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:56,134 INFO L82 PathProgramCache]: Analyzing trace with hash -455428470, now seen corresponding path program 144 times [2021-06-05 05:18:56,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:56,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056042682] [2021-06-05 05:18:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:56,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:56,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056042682] [2021-06-05 05:18:56,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056042682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:56,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301373653] [2021-06-05 05:18:56,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:56,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:18:56,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:56,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:18:56,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:18:56,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:56,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:56,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:56,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:56,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:18:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:56,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301373653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:56,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:56,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:18:56,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244634492] [2021-06-05 05:18:56,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:18:56,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:56,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:18:56,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:18:56,575 INFO L87 Difference]: Start difference. First operand 2228 states and 8165 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:57,589 INFO L93 Difference]: Finished difference Result 2746 states and 9710 transitions. [2021-06-05 05:18:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:18:57,590 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:57,594 INFO L225 Difference]: With dead ends: 2746 [2021-06-05 05:18:57,594 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 05:18:57,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 862.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1552, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:18:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 05:18:57,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2230. [2021-06-05 05:18:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.6657694033198744) internal successors, (8171), 2229 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 8171 transitions. [2021-06-05 05:18:57,622 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 8171 transitions. Word has length 24 [2021-06-05 05:18:57,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:57,622 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 8171 transitions. [2021-06-05 05:18:57,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:57,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 8171 transitions. [2021-06-05 05:18:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:57,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:57,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:57,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 05:18:57,835 INFO L430 AbstractCegarLoop]: === Iteration 272 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:57,836 INFO L82 PathProgramCache]: Analyzing trace with hash 808869012, now seen corresponding path program 145 times [2021-06-05 05:18:57,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:57,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591339187] [2021-06-05 05:18:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:58,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:58,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591339187] [2021-06-05 05:18:58,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591339187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:58,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143107454] [2021-06-05 05:18:58,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:58,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:18:58,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:58,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:18:58,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:58,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:58,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:58,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:18:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:58,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143107454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:58,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:58,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:18:58,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241797199] [2021-06-05 05:18:58,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:58,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:58,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:58,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:58,254 INFO L87 Difference]: Start difference. First operand 2230 states and 8171 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:18:59,254 INFO L93 Difference]: Finished difference Result 2749 states and 9747 transitions. [2021-06-05 05:18:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:18:59,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:18:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:18:59,258 INFO L225 Difference]: With dead ends: 2749 [2021-06-05 05:18:59,258 INFO L226 Difference]: Without dead ends: 2723 [2021-06-05 05:18:59,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 863.0ms TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:18:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-06-05 05:18:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2232. [2021-06-05 05:18:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 3.665172568354998) internal successors, (8177), 2231 states have internal predecessors, (8177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 8177 transitions. [2021-06-05 05:18:59,285 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 8177 transitions. Word has length 24 [2021-06-05 05:18:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:18:59,285 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 8177 transitions. [2021-06-05 05:18:59,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:18:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 8177 transitions. [2021-06-05 05:18:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:18:59,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:18:59,288 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:18:59,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 05:18:59,488 INFO L430 AbstractCegarLoop]: === Iteration 273 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:18:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:18:59,488 INFO L82 PathProgramCache]: Analyzing trace with hash 632327580, now seen corresponding path program 146 times [2021-06-05 05:18:59,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:18:59,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799735781] [2021-06-05 05:18:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:18:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:18:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:59,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:18:59,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799735781] [2021-06-05 05:18:59,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799735781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:59,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824241224] [2021-06-05 05:18:59,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:59,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:18:59,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:18:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:18:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:18:59,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:59,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:18:59,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:18:59,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:18:59,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:18:59,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:18:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:18:59,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824241224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:18:59,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:18:59,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:18:59,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234462761] [2021-06-05 05:18:59,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:18:59,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:18:59,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:18:59,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:18:59,891 INFO L87 Difference]: Start difference. First operand 2232 states and 8177 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:00,139 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 05:19:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:01,490 INFO L93 Difference]: Finished difference Result 2814 states and 9921 transitions. [2021-06-05 05:19:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:19:01,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:01,494 INFO L225 Difference]: With dead ends: 2814 [2021-06-05 05:19:01,494 INFO L226 Difference]: Without dead ends: 2778 [2021-06-05 05:19:01,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1374.3ms TimeCoverageRelationStatistics Valid=503, Invalid=2577, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:19:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-06-05 05:19:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2233. [2021-06-05 05:19:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.6657706093189963) internal successors, (8182), 2232 states have internal predecessors, (8182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8182 transitions. [2021-06-05 05:19:01,524 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8182 transitions. Word has length 24 [2021-06-05 05:19:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:01,524 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 8182 transitions. [2021-06-05 05:19:01,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8182 transitions. [2021-06-05 05:19:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:01,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:01,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:01,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:01,727 INFO L430 AbstractCegarLoop]: === Iteration 274 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash -201410860, now seen corresponding path program 147 times [2021-06-05 05:19:01,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:01,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076381102] [2021-06-05 05:19:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:01,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:01,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076381102] [2021-06-05 05:19:01,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076381102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:01,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169061908] [2021-06-05 05:19:01,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:01,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:19:01,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:01,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:02,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:02,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:02,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:02,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:02,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:02,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:02,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169061908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:02,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:02,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:02,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157016215] [2021-06-05 05:19:02,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:02,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:02,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:02,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:02,104 INFO L87 Difference]: Start difference. First operand 2233 states and 8182 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:02,347 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 05:19:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:03,502 INFO L93 Difference]: Finished difference Result 2807 states and 9852 transitions. [2021-06-05 05:19:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:19:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:03,507 INFO L225 Difference]: With dead ends: 2807 [2021-06-05 05:19:03,507 INFO L226 Difference]: Without dead ends: 2779 [2021-06-05 05:19:03,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1193.4ms TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:19:03,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-06-05 05:19:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2234. [2021-06-05 05:19:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 3.667263770712047) internal successors, (8189), 2233 states have internal predecessors, (8189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 8189 transitions. [2021-06-05 05:19:03,536 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 8189 transitions. Word has length 24 [2021-06-05 05:19:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:03,536 INFO L482 AbstractCegarLoop]: Abstraction has 2234 states and 8189 transitions. [2021-06-05 05:19:03,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 8189 transitions. [2021-06-05 05:19:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:03,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:03,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:03,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 05:19:03,739 INFO L430 AbstractCegarLoop]: === Iteration 275 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash 580422940, now seen corresponding path program 148 times [2021-06-05 05:19:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:03,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288717389] [2021-06-05 05:19:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:03,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:03,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288717389] [2021-06-05 05:19:03,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288717389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:03,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935779925] [2021-06-05 05:19:03,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:03,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:04,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:04,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:04,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:04,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:04,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:04,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935779925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:04,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:04,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:04,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200038357] [2021-06-05 05:19:04,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:04,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:04,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:04,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:04,080 INFO L87 Difference]: Start difference. First operand 2234 states and 8189 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:04,925 INFO L93 Difference]: Finished difference Result 2654 states and 9469 transitions. [2021-06-05 05:19:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:19:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:04,929 INFO L225 Difference]: With dead ends: 2654 [2021-06-05 05:19:04,930 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 05:19:04,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:19:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 05:19:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2233. [2021-06-05 05:19:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.668010752688172) internal successors, (8187), 2232 states have internal predecessors, (8187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8187 transitions. [2021-06-05 05:19:04,968 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8187 transitions. Word has length 24 [2021-06-05 05:19:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:04,969 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 8187 transitions. [2021-06-05 05:19:04,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8187 transitions. [2021-06-05 05:19:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:04,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:04,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:05,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 05:19:05,172 INFO L430 AbstractCegarLoop]: === Iteration 276 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:05,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1802814956, now seen corresponding path program 149 times [2021-06-05 05:19:05,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:05,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294627371] [2021-06-05 05:19:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:05,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:05,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294627371] [2021-06-05 05:19:05,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294627371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:05,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089857407] [2021-06-05 05:19:05,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:05,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:05,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:05,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:05,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:05,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:19:05,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:05,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:05,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:05,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:19:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:05,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089857407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:05,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:05,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:19:05,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387038712] [2021-06-05 05:19:05,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:05,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:05,536 INFO L87 Difference]: Start difference. First operand 2233 states and 8187 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:06,616 INFO L93 Difference]: Finished difference Result 2750 states and 9744 transitions. [2021-06-05 05:19:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:19:06,616 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:06,620 INFO L225 Difference]: With dead ends: 2750 [2021-06-05 05:19:06,621 INFO L226 Difference]: Without dead ends: 2714 [2021-06-05 05:19:06,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 911.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:19:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-05 05:19:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2238. [2021-06-05 05:19:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.6678587393831026) internal successors, (8205), 2237 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 8205 transitions. [2021-06-05 05:19:06,648 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 8205 transitions. Word has length 24 [2021-06-05 05:19:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:06,648 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 8205 transitions. [2021-06-05 05:19:06,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 8205 transitions. [2021-06-05 05:19:06,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:06,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:06,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:06,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:06,851 INFO L430 AbstractCegarLoop]: === Iteration 277 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:06,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1464002480, now seen corresponding path program 150 times [2021-06-05 05:19:06,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:06,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035507477] [2021-06-05 05:19:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:07,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:07,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035507477] [2021-06-05 05:19:07,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035507477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:07,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246152772] [2021-06-05 05:19:07,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:07,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:19:07,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:07,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:07,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:07,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:07,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:07,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:07,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:07,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:07,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246152772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:07,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:07,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:07,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665637390] [2021-06-05 05:19:07,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:07,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:07,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:07,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:07,260 INFO L87 Difference]: Start difference. First operand 2238 states and 8205 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:08,415 INFO L93 Difference]: Finished difference Result 2707 states and 9616 transitions. [2021-06-05 05:19:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:19:08,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:08,420 INFO L225 Difference]: With dead ends: 2707 [2021-06-05 05:19:08,420 INFO L226 Difference]: Without dead ends: 2671 [2021-06-05 05:19:08,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1111.9ms TimeCoverageRelationStatistics Valid=380, Invalid=1876, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:19:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-06-05 05:19:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2243. [2021-06-05 05:19:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.6663693131132917) internal successors, (8220), 2242 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8220 transitions. [2021-06-05 05:19:08,447 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8220 transitions. Word has length 24 [2021-06-05 05:19:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:08,448 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8220 transitions. [2021-06-05 05:19:08,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8220 transitions. [2021-06-05 05:19:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:08,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:08,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:08,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:08,651 INFO L430 AbstractCegarLoop]: === Iteration 278 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:08,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1787588658, now seen corresponding path program 151 times [2021-06-05 05:19:08,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:08,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939929553] [2021-06-05 05:19:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:08,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:08,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939929553] [2021-06-05 05:19:08,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939929553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:08,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67497505] [2021-06-05 05:19:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:08,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:08,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:08,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:08,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:08,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:08,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:08,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67497505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:08,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:08,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:08,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077916910] [2021-06-05 05:19:08,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:08,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:08,979 INFO L87 Difference]: Start difference. First operand 2243 states and 8220 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:09,720 INFO L93 Difference]: Finished difference Result 2641 states and 9458 transitions. [2021-06-05 05:19:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:19:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:09,724 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 05:19:09,724 INFO L226 Difference]: Without dead ends: 2616 [2021-06-05 05:19:09,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 701.0ms TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:19:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-05 05:19:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2236. [2021-06-05 05:19:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 3.668456375838926) internal successors, (8199), 2235 states have internal predecessors, (8199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 8199 transitions. [2021-06-05 05:19:09,751 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 8199 transitions. Word has length 24 [2021-06-05 05:19:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:09,751 INFO L482 AbstractCegarLoop]: Abstraction has 2236 states and 8199 transitions. [2021-06-05 05:19:09,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 8199 transitions. [2021-06-05 05:19:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:09,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:09,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:09,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:09,954 INFO L430 AbstractCegarLoop]: === Iteration 279 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:09,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1183368252, now seen corresponding path program 152 times [2021-06-05 05:19:09,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:09,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257285143] [2021-06-05 05:19:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:10,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:10,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257285143] [2021-06-05 05:19:10,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257285143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:10,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694521088] [2021-06-05 05:19:10,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:10,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:10,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:10,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:10,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:10,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:19:10,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:19:10,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:19:10,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:10,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:10,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:10,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:19:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:10,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694521088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:10,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:10,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:19:10,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636203212] [2021-06-05 05:19:10,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:19:10,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:10,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:19:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:19:10,377 INFO L87 Difference]: Start difference. First operand 2236 states and 8199 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:11,453 INFO L93 Difference]: Finished difference Result 2732 states and 9669 transitions. [2021-06-05 05:19:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:19:11,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:11,458 INFO L225 Difference]: With dead ends: 2732 [2021-06-05 05:19:11,458 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 05:19:11,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 848.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:19:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 05:19:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2238. [2021-06-05 05:19:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.6678587393831026) internal successors, (8205), 2237 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 8205 transitions. [2021-06-05 05:19:11,484 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 8205 transitions. Word has length 24 [2021-06-05 05:19:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:11,484 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 8205 transitions. [2021-06-05 05:19:11,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 8205 transitions. [2021-06-05 05:19:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:11,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:11,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:11,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 05:19:11,687 INFO L430 AbstractCegarLoop]: === Iteration 280 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash -965943366, now seen corresponding path program 153 times [2021-06-05 05:19:11,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:11,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640564842] [2021-06-05 05:19:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:11,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:11,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640564842] [2021-06-05 05:19:11,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640564842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:11,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311789322] [2021-06-05 05:19:11,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:11,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:19:11,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:11,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:11,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:11,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:11,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:11,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:11,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:11,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:11,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:12,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311789322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:12,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:12,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:12,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714863349] [2021-06-05 05:19:12,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:12,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:12,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:12,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:12,054 INFO L87 Difference]: Start difference. First operand 2238 states and 8205 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:13,060 INFO L93 Difference]: Finished difference Result 2712 states and 9639 transitions. [2021-06-05 05:19:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:19:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:13,065 INFO L225 Difference]: With dead ends: 2712 [2021-06-05 05:19:13,065 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 05:19:13,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 827.8ms TimeCoverageRelationStatistics Valid=281, Invalid=1699, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:19:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 05:19:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2240. [2021-06-05 05:19:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 3.6677087985707906) internal successors, (8212), 2239 states have internal predecessors, (8212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 8212 transitions. [2021-06-05 05:19:13,093 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 8212 transitions. Word has length 24 [2021-06-05 05:19:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:13,093 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 8212 transitions. [2021-06-05 05:19:13,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 8212 transitions. [2021-06-05 05:19:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:13,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:13,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:13,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 05:19:13,297 INFO L430 AbstractCegarLoop]: === Iteration 281 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1799681806, now seen corresponding path program 154 times [2021-06-05 05:19:13,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:13,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722091026] [2021-06-05 05:19:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:13,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:13,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722091026] [2021-06-05 05:19:13,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722091026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:13,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414010343] [2021-06-05 05:19:13,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:13,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:13,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:13,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:13,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:13,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:13,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:13,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:13,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:13,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:13,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414010343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:13,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:13,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:13,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860726739] [2021-06-05 05:19:13,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:13,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:13,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:13,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:13,633 INFO L87 Difference]: Start difference. First operand 2240 states and 8212 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:14,490 INFO L93 Difference]: Finished difference Result 2727 states and 9699 transitions. [2021-06-05 05:19:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:19:14,491 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:14,495 INFO L225 Difference]: With dead ends: 2727 [2021-06-05 05:19:14,495 INFO L226 Difference]: Without dead ends: 2703 [2021-06-05 05:19:14,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 766.8ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:19:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-06-05 05:19:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2237. [2021-06-05 05:19:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.6686046511627906) internal successors, (8203), 2236 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 8203 transitions. [2021-06-05 05:19:14,524 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 8203 transitions. Word has length 24 [2021-06-05 05:19:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:14,524 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 8203 transitions. [2021-06-05 05:19:14,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 8203 transitions. [2021-06-05 05:19:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:14,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:14,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:14,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:14,728 INFO L430 AbstractCegarLoop]: === Iteration 282 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:14,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:14,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1662660090, now seen corresponding path program 155 times [2021-06-05 05:19:14,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:14,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841014975] [2021-06-05 05:19:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:14,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:14,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841014975] [2021-06-05 05:19:14,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841014975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:14,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305030096] [2021-06-05 05:19:14,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:14,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:14,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:14,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:14,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:14,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:14,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:14,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:19:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:15,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305030096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:15,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:15,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:15,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372297721] [2021-06-05 05:19:15,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:15,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:15,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:15,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:15,048 INFO L87 Difference]: Start difference. First operand 2237 states and 8203 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:15,879 INFO L93 Difference]: Finished difference Result 2663 states and 9503 transitions. [2021-06-05 05:19:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:19:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:15,892 INFO L225 Difference]: With dead ends: 2663 [2021-06-05 05:19:15,892 INFO L226 Difference]: Without dead ends: 2637 [2021-06-05 05:19:15,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 736.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:19:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-06-05 05:19:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2241. [2021-06-05 05:19:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 3.6669642857142857) internal successors, (8214), 2240 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 8214 transitions. [2021-06-05 05:19:15,917 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 8214 transitions. Word has length 24 [2021-06-05 05:19:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:15,918 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 8214 transitions. [2021-06-05 05:19:15,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 8214 transitions. [2021-06-05 05:19:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:15,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:15,920 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:16,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:16,121 INFO L430 AbstractCegarLoop]: === Iteration 283 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1986246268, now seen corresponding path program 156 times [2021-06-05 05:19:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:16,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590465151] [2021-06-05 05:19:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:16,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:16,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590465151] [2021-06-05 05:19:16,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590465151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186437511] [2021-06-05 05:19:16,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:16,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:16,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:16,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:16,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:16,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:16,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:16,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:16,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:19:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:16,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186437511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:16,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:16,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:16,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137787903] [2021-06-05 05:19:16,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:16,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:16,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:16,503 INFO L87 Difference]: Start difference. First operand 2241 states and 8214 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:17,676 INFO L93 Difference]: Finished difference Result 2693 states and 9554 transitions. [2021-06-05 05:19:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:19:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:17,681 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 05:19:17,681 INFO L226 Difference]: Without dead ends: 2665 [2021-06-05 05:19:17,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1060.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:19:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-05 05:19:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2248. [2021-06-05 05:19:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 3.6653315531820203) internal successors, (8236), 2247 states have internal predecessors, (8236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 8236 transitions. [2021-06-05 05:19:17,708 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 8236 transitions. Word has length 24 [2021-06-05 05:19:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:17,708 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 8236 transitions. [2021-06-05 05:19:17,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 8236 transitions. [2021-06-05 05:19:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:17,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:17,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:17,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:17,912 INFO L430 AbstractCegarLoop]: === Iteration 284 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash -622976906, now seen corresponding path program 157 times [2021-06-05 05:19:17,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:17,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164189058] [2021-06-05 05:19:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:18,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164189058] [2021-06-05 05:19:18,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164189058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761440144] [2021-06-05 05:19:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:18,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:18,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:18,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:18,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:18,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:19:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:18,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761440144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:18,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:18,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:18,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84521820] [2021-06-05 05:19:18,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:18,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:18,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:18,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:18,212 INFO L87 Difference]: Start difference. First operand 2248 states and 8236 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:19,029 INFO L93 Difference]: Finished difference Result 2567 states and 9221 transitions. [2021-06-05 05:19:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:19:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:19,034 INFO L225 Difference]: With dead ends: 2567 [2021-06-05 05:19:19,034 INFO L226 Difference]: Without dead ends: 2550 [2021-06-05 05:19:19,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:19:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-06-05 05:19:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2242. [2021-06-05 05:19:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 05:19:19,061 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 05:19:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:19,061 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 05:19:19,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 05:19:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:19,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:19,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:19,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 05:19:19,265 INFO L430 AbstractCegarLoop]: === Iteration 285 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1959736906, now seen corresponding path program 158 times [2021-06-05 05:19:19,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:19,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453515526] [2021-06-05 05:19:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:19,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:19,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453515526] [2021-06-05 05:19:19,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453515526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:19,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310279110] [2021-06-05 05:19:19,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:19,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:19,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:19,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:19,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:19,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:19,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:19,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:19:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:19,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310279110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:19,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:19,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:19,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945804910] [2021-06-05 05:19:19,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:19,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:19,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:19,594 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:20,478 INFO L93 Difference]: Finished difference Result 2691 states and 9584 transitions. [2021-06-05 05:19:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:19:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:20,483 INFO L225 Difference]: With dead ends: 2691 [2021-06-05 05:19:20,483 INFO L226 Difference]: Without dead ends: 2665 [2021-06-05 05:19:20,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 721.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:19:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-05 05:19:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2242. [2021-06-05 05:19:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:20,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 05:19:20,510 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 05:19:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:20,510 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 05:19:20,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 05:19:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:20,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:20,513 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:20,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 05:19:20,728 INFO L430 AbstractCegarLoop]: === Iteration 286 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash 168875732, now seen corresponding path program 159 times [2021-06-05 05:19:20,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:20,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894808344] [2021-06-05 05:19:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:20,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894808344] [2021-06-05 05:19:20,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894808344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881550625] [2021-06-05 05:19:20,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:20,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:20,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:20,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:20,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:20,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:20,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:20,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:20,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:20,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:19:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:21,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881550625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:21,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:21,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:21,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87089294] [2021-06-05 05:19:21,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:21,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:21,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:21,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:21,103 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:22,371 INFO L93 Difference]: Finished difference Result 2763 states and 9734 transitions. [2021-06-05 05:19:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:19:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:22,375 INFO L225 Difference]: With dead ends: 2763 [2021-06-05 05:19:22,376 INFO L226 Difference]: Without dead ends: 2735 [2021-06-05 05:19:22,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1099.0ms TimeCoverageRelationStatistics Valid=380, Invalid=2070, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:19:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-06-05 05:19:22,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2242. [2021-06-05 05:19:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 05:19:22,403 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 05:19:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:22,403 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 05:19:22,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 05:19:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:22,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:22,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:22,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:22,607 INFO L430 AbstractCegarLoop]: === Iteration 287 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:22,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:22,607 INFO L82 PathProgramCache]: Analyzing trace with hash 950709532, now seen corresponding path program 160 times [2021-06-05 05:19:22,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:22,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48706011] [2021-06-05 05:19:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:22,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:22,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48706011] [2021-06-05 05:19:22,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48706011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:22,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661386657] [2021-06-05 05:19:22,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:22,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:22,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:22,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:22,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:22,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:22,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:22,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:22,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:22,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:19:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:22,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661386657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:22,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:22,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:22,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298607503] [2021-06-05 05:19:22,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:22,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:22,931 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:23,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:23,544 INFO L93 Difference]: Finished difference Result 2600 states and 9316 transitions. [2021-06-05 05:19:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:19:23,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:23,548 INFO L225 Difference]: With dead ends: 2600 [2021-06-05 05:19:23,548 INFO L226 Difference]: Without dead ends: 2586 [2021-06-05 05:19:23,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 588.1ms TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:19:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-05 05:19:23,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2242. [2021-06-05 05:19:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:23,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 05:19:23,573 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 05:19:23,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:23,573 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 05:19:23,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 05:19:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:23,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:23,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:23,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 05:19:23,776 INFO L430 AbstractCegarLoop]: === Iteration 288 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:23,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:23,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1895765076, now seen corresponding path program 161 times [2021-06-05 05:19:23,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:23,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943225180] [2021-06-05 05:19:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:23,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:23,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943225180] [2021-06-05 05:19:23,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943225180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:23,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931240916] [2021-06-05 05:19:23,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:23,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:23,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:24,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:24,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:24,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:24,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:24,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:19:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:24,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931240916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:24,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:24,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:24,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96217758] [2021-06-05 05:19:24,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:24,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:24,102 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:24,901 INFO L93 Difference]: Finished difference Result 2624 states and 9395 transitions. [2021-06-05 05:19:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:19:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:24,905 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 05:19:24,905 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 05:19:24,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 684.9ms TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:19:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 05:19:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2244. [2021-06-05 05:19:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 3.666518056174766) internal successors, (8224), 2243 states have internal predecessors, (8224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 8224 transitions. [2021-06-05 05:19:24,931 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 8224 transitions. Word has length 24 [2021-06-05 05:19:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:24,932 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 8224 transitions. [2021-06-05 05:19:24,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 8224 transitions. [2021-06-05 05:19:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:24,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:24,934 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:25,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:25,135 INFO L430 AbstractCegarLoop]: === Iteration 289 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1419787772, now seen corresponding path program 162 times [2021-06-05 05:19:25,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:25,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416444307] [2021-06-05 05:19:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:25,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:25,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416444307] [2021-06-05 05:19:25,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416444307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:25,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380856948] [2021-06-05 05:19:25,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:25,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:25,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:25,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:25,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:25,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:25,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:25,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:25,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:19:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:25,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380856948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:25,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:25,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:25,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409462524] [2021-06-05 05:19:25,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:25,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:25,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:25,434 INFO L87 Difference]: Start difference. First operand 2244 states and 8224 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:26,173 INFO L93 Difference]: Finished difference Result 2641 states and 9443 transitions. [2021-06-05 05:19:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:19:26,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:26,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:26,177 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 05:19:26,177 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 05:19:26,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:19:26,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 05:19:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2243. [2021-06-05 05:19:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.6672613737734165) internal successors, (8222), 2242 states have internal predecessors, (8222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8222 transitions. [2021-06-05 05:19:26,203 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8222 transitions. Word has length 24 [2021-06-05 05:19:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:26,203 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8222 transitions. [2021-06-05 05:19:26,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8222 transitions. [2021-06-05 05:19:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:26,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:26,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:26,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-05 05:19:26,406 INFO L430 AbstractCegarLoop]: === Iteration 290 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:26,407 INFO L82 PathProgramCache]: Analyzing trace with hash 613259036, now seen corresponding path program 93 times [2021-06-05 05:19:26,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:26,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085398577] [2021-06-05 05:19:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:26,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:26,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085398577] [2021-06-05 05:19:26,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085398577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:26,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69202790] [2021-06-05 05:19:26,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:26,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:19:26,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:26,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:26,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:26,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:26,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:19:26,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:26,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:26,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:26,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:19:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:26,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69202790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:26,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:26,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:19:26,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937615321] [2021-06-05 05:19:26,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:19:26,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:26,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:19:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:19:26,833 INFO L87 Difference]: Start difference. First operand 2243 states and 8222 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:27,357 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 05:19:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:29,232 INFO L93 Difference]: Finished difference Result 3179 states and 11053 transitions. [2021-06-05 05:19:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:19:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:29,237 INFO L225 Difference]: With dead ends: 3179 [2021-06-05 05:19:29,237 INFO L226 Difference]: Without dead ends: 3088 [2021-06-05 05:19:29,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 2071.3ms TimeCoverageRelationStatistics Valid=685, Invalid=4007, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:19:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-06-05 05:19:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2264. [2021-06-05 05:19:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 3.664162615996465) internal successors, (8292), 2263 states have internal predecessors, (8292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 8292 transitions. [2021-06-05 05:19:29,267 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 8292 transitions. Word has length 24 [2021-06-05 05:19:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:29,267 INFO L482 AbstractCegarLoop]: Abstraction has 2264 states and 8292 transitions. [2021-06-05 05:19:29,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 8292 transitions. [2021-06-05 05:19:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:29,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:29,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:29,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:29,470 INFO L430 AbstractCegarLoop]: === Iteration 291 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:29,470 INFO L82 PathProgramCache]: Analyzing trace with hash 830683922, now seen corresponding path program 94 times [2021-06-05 05:19:29,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:29,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577951400] [2021-06-05 05:19:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:29,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:29,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577951400] [2021-06-05 05:19:29,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577951400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:29,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618226929] [2021-06-05 05:19:29,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:29,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:29,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:29,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:29,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:29,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:29,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:29,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:29,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:29,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618226929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:29,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:29,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:29,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938088064] [2021-06-05 05:19:29,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:29,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:29,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:29,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:29,783 INFO L87 Difference]: Start difference. First operand 2264 states and 8292 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:31,510 INFO L93 Difference]: Finished difference Result 2991 states and 10538 transitions. [2021-06-05 05:19:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:19:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:31,515 INFO L225 Difference]: With dead ends: 2991 [2021-06-05 05:19:31,515 INFO L226 Difference]: Without dead ends: 2941 [2021-06-05 05:19:31,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1520.8ms TimeCoverageRelationStatistics Valid=596, Invalid=2596, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:19:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-06-05 05:19:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2278. [2021-06-05 05:19:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 3.6644707949055775) internal successors, (8344), 2277 states have internal predecessors, (8344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 8344 transitions. [2021-06-05 05:19:31,547 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 8344 transitions. Word has length 24 [2021-06-05 05:19:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:31,547 INFO L482 AbstractCegarLoop]: Abstraction has 2278 states and 8344 transitions. [2021-06-05 05:19:31,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 8344 transitions. [2021-06-05 05:19:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:31,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:31,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:31,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 05:19:31,751 INFO L430 AbstractCegarLoop]: === Iteration 292 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:31,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1255427878, now seen corresponding path program 163 times [2021-06-05 05:19:31,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:31,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211044123] [2021-06-05 05:19:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:31,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211044123] [2021-06-05 05:19:31,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211044123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103757987] [2021-06-05 05:19:31,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:31,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:32,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:19:32,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:32,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:32,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:32,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:19:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:32,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103757987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:32,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:32,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:19:32,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256293866] [2021-06-05 05:19:32,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:32,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:32,102 INFO L87 Difference]: Start difference. First operand 2278 states and 8344 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:34,445 INFO L93 Difference]: Finished difference Result 3202 states and 11156 transitions. [2021-06-05 05:19:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:19:34,446 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:34,451 INFO L225 Difference]: With dead ends: 3202 [2021-06-05 05:19:34,451 INFO L226 Difference]: Without dead ends: 3150 [2021-06-05 05:19:34,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1919.9ms TimeCoverageRelationStatistics Valid=736, Invalid=3820, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:19:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-06-05 05:19:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2284. [2021-06-05 05:19:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 3.6649145860709593) internal successors, (8367), 2283 states have internal predecessors, (8367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 8367 transitions. [2021-06-05 05:19:34,481 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 8367 transitions. Word has length 24 [2021-06-05 05:19:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:34,481 INFO L482 AbstractCegarLoop]: Abstraction has 2284 states and 8367 transitions. [2021-06-05 05:19:34,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 8367 transitions. [2021-06-05 05:19:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:34,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:34,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:34,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 05:19:34,684 INFO L430 AbstractCegarLoop]: === Iteration 293 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:34,685 INFO L82 PathProgramCache]: Analyzing trace with hash 227278018, now seen corresponding path program 164 times [2021-06-05 05:19:34,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:34,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496694685] [2021-06-05 05:19:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:34,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496694685] [2021-06-05 05:19:34,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496694685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087677442] [2021-06-05 05:19:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:34,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:34,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:34,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:34,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:34,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:34,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:34,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:34,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:35,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087677442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:35,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:35,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:35,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674008311] [2021-06-05 05:19:35,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:35,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:35,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:35,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:35,042 INFO L87 Difference]: Start difference. First operand 2284 states and 8367 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:35,529 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 05:19:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:37,097 INFO L93 Difference]: Finished difference Result 2986 states and 10490 transitions. [2021-06-05 05:19:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:19:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:37,101 INFO L225 Difference]: With dead ends: 2986 [2021-06-05 05:19:37,101 INFO L226 Difference]: Without dead ends: 2917 [2021-06-05 05:19:37,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1800.8ms TimeCoverageRelationStatistics Valid=659, Invalid=3373, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:19:37,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-05 05:19:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2288. [2021-06-05 05:19:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 3.6637516397026673) internal successors, (8379), 2287 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8379 transitions. [2021-06-05 05:19:37,131 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8379 transitions. Word has length 24 [2021-06-05 05:19:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:37,131 INFO L482 AbstractCegarLoop]: Abstraction has 2288 states and 8379 transitions. [2021-06-05 05:19:37,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8379 transitions. [2021-06-05 05:19:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:37,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:37,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:37,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:37,334 INFO L430 AbstractCegarLoop]: === Iteration 294 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:37,334 INFO L82 PathProgramCache]: Analyzing trace with hash 550864196, now seen corresponding path program 165 times [2021-06-05 05:19:37,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:37,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576358172] [2021-06-05 05:19:37,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:37,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:37,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576358172] [2021-06-05 05:19:37,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576358172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:37,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94631491] [2021-06-05 05:19:37,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:37,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:19:37,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:37,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:37,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:37,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:37,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:37,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:37,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:37,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94631491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:37,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:37,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:37,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662459652] [2021-06-05 05:19:37,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:37,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:37,715 INFO L87 Difference]: Start difference. First operand 2288 states and 8379 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:38,171 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 05:19:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:39,886 INFO L93 Difference]: Finished difference Result 2940 states and 10329 transitions. [2021-06-05 05:19:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:19:39,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:39,891 INFO L225 Difference]: With dead ends: 2940 [2021-06-05 05:19:39,891 INFO L226 Difference]: Without dead ends: 2900 [2021-06-05 05:19:39,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1923.3ms TimeCoverageRelationStatistics Valid=683, Invalid=3739, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:19:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-06-05 05:19:39,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2296. [2021-06-05 05:19:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.6631808278867104) internal successors, (8407), 2295 states have internal predecessors, (8407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8407 transitions. [2021-06-05 05:19:39,920 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8407 transitions. Word has length 24 [2021-06-05 05:19:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:39,920 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 8407 transitions. [2021-06-05 05:19:39,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8407 transitions. [2021-06-05 05:19:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:39,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:39,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:40,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 05:19:40,124 INFO L430 AbstractCegarLoop]: === Iteration 295 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:40,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2058358978, now seen corresponding path program 166 times [2021-06-05 05:19:40,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:40,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728026716] [2021-06-05 05:19:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:40,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728026716] [2021-06-05 05:19:40,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728026716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642467120] [2021-06-05 05:19:40,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:40,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:19:40,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:40,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:40,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:40,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:40,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:40,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:40,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:40,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:40,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642467120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:40,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:40,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:40,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361326982] [2021-06-05 05:19:40,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:40,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:40,428 INFO L87 Difference]: Start difference. First operand 2296 states and 8407 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:41,942 INFO L93 Difference]: Finished difference Result 2804 states and 9972 transitions. [2021-06-05 05:19:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:19:41,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:41,946 INFO L225 Difference]: With dead ends: 2804 [2021-06-05 05:19:41,947 INFO L226 Difference]: Without dead ends: 2783 [2021-06-05 05:19:41,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1270.1ms TimeCoverageRelationStatistics Valid=514, Invalid=2566, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:19:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-05 05:19:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2280. [2021-06-05 05:19:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 3.6652040368582712) internal successors, (8353), 2279 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 8353 transitions. [2021-06-05 05:19:41,974 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 8353 transitions. Word has length 24 [2021-06-05 05:19:41,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:41,975 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 8353 transitions. [2021-06-05 05:19:41,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 8353 transitions. [2021-06-05 05:19:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:41,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:41,977 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:42,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:42,178 INFO L430 AbstractCegarLoop]: === Iteration 296 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1599381192, now seen corresponding path program 95 times [2021-06-05 05:19:42,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:42,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835094084] [2021-06-05 05:19:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:42,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:42,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835094084] [2021-06-05 05:19:42,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835094084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:42,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327280013] [2021-06-05 05:19:42,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:42,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:42,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:42,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:42,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:42,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:42,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:42,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:42,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327280013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:42,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:42,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:42,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500166452] [2021-06-05 05:19:42,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:42,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:42,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:42,509 INFO L87 Difference]: Start difference. First operand 2280 states and 8353 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:44,762 INFO L93 Difference]: Finished difference Result 4178 states and 14207 transitions. [2021-06-05 05:19:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:19:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:44,768 INFO L225 Difference]: With dead ends: 4178 [2021-06-05 05:19:44,768 INFO L226 Difference]: Without dead ends: 4124 [2021-06-05 05:19:44,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 1907.3ms TimeCoverageRelationStatistics Valid=1073, Invalid=4627, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:19:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-06-05 05:19:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 2366. [2021-06-05 05:19:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 3.6841437632135308) internal successors, (8713), 2365 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 8713 transitions. [2021-06-05 05:19:44,806 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 8713 transitions. Word has length 24 [2021-06-05 05:19:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:44,806 INFO L482 AbstractCegarLoop]: Abstraction has 2366 states and 8713 transitions. [2021-06-05 05:19:44,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 8713 transitions. [2021-06-05 05:19:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:44,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:44,809 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:45,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 05:19:45,009 INFO L430 AbstractCegarLoop]: === Iteration 297 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:45,010 INFO L82 PathProgramCache]: Analyzing trace with hash 904724930, now seen corresponding path program 96 times [2021-06-05 05:19:45,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:45,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001367627] [2021-06-05 05:19:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:45,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:45,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001367627] [2021-06-05 05:19:45,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001367627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:45,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906905552] [2021-06-05 05:19:45,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:45,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:45,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:45,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:45,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:45,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:45,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:45,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:45,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:45,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906905552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:45,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:45,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:45,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810591126] [2021-06-05 05:19:45,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:45,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:45,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:45,389 INFO L87 Difference]: Start difference. First operand 2366 states and 8713 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:45,977 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-06-05 05:19:48,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:48,449 INFO L93 Difference]: Finished difference Result 3774 states and 13082 transitions. [2021-06-05 05:19:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:19:48,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:48,456 INFO L225 Difference]: With dead ends: 3774 [2021-06-05 05:19:48,456 INFO L226 Difference]: Without dead ends: 3752 [2021-06-05 05:19:48,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 2695.4ms TimeCoverageRelationStatistics Valid=1227, Invalid=5579, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:19:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-06-05 05:19:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 2395. [2021-06-05 05:19:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.6875522138680035) internal successors, (8828), 2394 states have internal predecessors, (8828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 8828 transitions. [2021-06-05 05:19:48,493 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 8828 transitions. Word has length 24 [2021-06-05 05:19:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:48,493 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 8828 transitions. [2021-06-05 05:19:48,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 8828 transitions. [2021-06-05 05:19:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:48,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:48,496 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:48,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 05:19:48,697 INFO L430 AbstractCegarLoop]: === Iteration 298 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:48,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1686558730, now seen corresponding path program 97 times [2021-06-05 05:19:48,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:48,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847349843] [2021-06-05 05:19:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:48,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:48,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847349843] [2021-06-05 05:19:48,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847349843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:48,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420327585] [2021-06-05 05:19:48,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:48,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:48,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:48,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:48,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:48,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:49,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420327585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:49,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:49,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:19:49,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823910039] [2021-06-05 05:19:49,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:19:49,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:49,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:19:49,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:19:49,029 INFO L87 Difference]: Start difference. First operand 2395 states and 8828 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:51,201 INFO L93 Difference]: Finished difference Result 3784 states and 13107 transitions. [2021-06-05 05:19:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:19:51,202 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:51,208 INFO L225 Difference]: With dead ends: 3784 [2021-06-05 05:19:51,208 INFO L226 Difference]: Without dead ends: 3728 [2021-06-05 05:19:51,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 1908.5ms TimeCoverageRelationStatistics Valid=938, Invalid=4612, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:19:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-05 05:19:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2433. [2021-06-05 05:19:51,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 3.6969572368421053) internal successors, (8991), 2432 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 8991 transitions. [2021-06-05 05:19:51,244 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 8991 transitions. Word has length 24 [2021-06-05 05:19:51,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:51,244 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 8991 transitions. [2021-06-05 05:19:51,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 8991 transitions. [2021-06-05 05:19:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:51,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:51,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:51,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:51,448 INFO L430 AbstractCegarLoop]: === Iteration 299 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:51,448 INFO L82 PathProgramCache]: Analyzing trace with hash 638091246, now seen corresponding path program 167 times [2021-06-05 05:19:51,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:51,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008285890] [2021-06-05 05:19:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:51,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:51,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008285890] [2021-06-05 05:19:51,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008285890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:51,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135640509] [2021-06-05 05:19:51,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:51,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:19:51,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:51,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:19:51,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:51,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:19:51,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:51,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:51,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:51,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:19:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:51,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135640509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:51,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:51,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:19:51,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940474303] [2021-06-05 05:19:51,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:19:51,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:51,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:19:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:19:51,746 INFO L87 Difference]: Start difference. First operand 2433 states and 8991 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:54,107 INFO L93 Difference]: Finished difference Result 4247 states and 14593 transitions. [2021-06-05 05:19:54,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:19:54,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:54,114 INFO L225 Difference]: With dead ends: 4247 [2021-06-05 05:19:54,114 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 05:19:54,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 1976.8ms TimeCoverageRelationStatistics Valid=1171, Invalid=5149, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:19:54,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 05:19:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 2486. [2021-06-05 05:19:54,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 3.719919517102616) internal successors, (9244), 2485 states have internal predecessors, (9244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 9244 transitions. [2021-06-05 05:19:54,154 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 9244 transitions. Word has length 24 [2021-06-05 05:19:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:54,154 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 9244 transitions. [2021-06-05 05:19:54,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 9244 transitions. [2021-06-05 05:19:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:54,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:54,157 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:54,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 05:19:54,358 INFO L430 AbstractCegarLoop]: === Iteration 300 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:54,358 INFO L82 PathProgramCache]: Analyzing trace with hash 961677424, now seen corresponding path program 168 times [2021-06-05 05:19:54,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:54,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637499832] [2021-06-05 05:19:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:54,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:54,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637499832] [2021-06-05 05:19:54,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637499832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:54,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188091187] [2021-06-05 05:19:54,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:54,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:19:54,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:54,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:54,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:19:54,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:54,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:54,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:54,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:19:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:54,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188091187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:54,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:54,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:54,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29987737] [2021-06-05 05:19:54,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:54,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:54,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:54,703 INFO L87 Difference]: Start difference. First operand 2486 states and 9244 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:19:56,960 INFO L93 Difference]: Finished difference Result 3963 states and 13816 transitions. [2021-06-05 05:19:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:19:56,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:19:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:19:56,966 INFO L225 Difference]: With dead ends: 3963 [2021-06-05 05:19:56,966 INFO L226 Difference]: Without dead ends: 3909 [2021-06-05 05:19:56,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 1880.7ms TimeCoverageRelationStatistics Valid=1022, Invalid=4830, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:19:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-05 05:19:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 2494. [2021-06-05 05:19:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 3.724027276373847) internal successors, (9284), 2493 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 9284 transitions. [2021-06-05 05:19:57,015 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 9284 transitions. Word has length 24 [2021-06-05 05:19:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:19:57,015 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 9284 transitions. [2021-06-05 05:19:57,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:19:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 9284 transitions. [2021-06-05 05:19:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:19:57,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:19:57,018 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:19:57,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:57,219 INFO L430 AbstractCegarLoop]: === Iteration 301 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:19:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:19:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1498600092, now seen corresponding path program 98 times [2021-06-05 05:19:57,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:19:57,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529094406] [2021-06-05 05:19:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:19:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:19:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:57,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:19:57,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529094406] [2021-06-05 05:19:57,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529094406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:57,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303825141] [2021-06-05 05:19:57,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:19:57,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:19:57,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:19:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:19:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:19:57,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:57,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:19:57,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:19:57,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:19:57,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:19:57,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:19:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:19:57,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303825141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:19:57,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:19:57,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:19:57,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428310122] [2021-06-05 05:19:57,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:19:57,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:19:57,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:19:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:19:57,572 INFO L87 Difference]: Start difference. First operand 2494 states and 9284 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:00,134 INFO L93 Difference]: Finished difference Result 4202 states and 14799 transitions. [2021-06-05 05:20:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:20:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:00,141 INFO L225 Difference]: With dead ends: 4202 [2021-06-05 05:20:00,141 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 05:20:00,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 2136.9ms TimeCoverageRelationStatistics Valid=988, Invalid=5332, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:20:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 05:20:00,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2769. [2021-06-05 05:20:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2768 states have (on average 3.7846820809248554) internal successors, (10476), 2768 states have internal predecessors, (10476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 10476 transitions. [2021-06-05 05:20:00,186 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 10476 transitions. Word has length 24 [2021-06-05 05:20:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:00,186 INFO L482 AbstractCegarLoop]: Abstraction has 2769 states and 10476 transitions. [2021-06-05 05:20:00,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 10476 transitions. [2021-06-05 05:20:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:00,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:00,189 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:00,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-06-05 05:20:00,390 INFO L430 AbstractCegarLoop]: === Iteration 302 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1293681958, now seen corresponding path program 169 times [2021-06-05 05:20:00,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:00,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093977782] [2021-06-05 05:20:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:00,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:00,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093977782] [2021-06-05 05:20:00,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093977782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:00,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281216585] [2021-06-05 05:20:00,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:00,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:20:00,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:00,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:00,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:00,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:20:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:00,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281216585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:00,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:00,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:00,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058905028] [2021-06-05 05:20:00,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:00,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:00,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:00,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:00,710 INFO L87 Difference]: Start difference. First operand 2769 states and 10476 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:03,119 INFO L93 Difference]: Finished difference Result 4592 states and 16115 transitions. [2021-06-05 05:20:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:20:03,119 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:03,126 INFO L225 Difference]: With dead ends: 4592 [2021-06-05 05:20:03,126 INFO L226 Difference]: Without dead ends: 4538 [2021-06-05 05:20:03,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 1967.5ms TimeCoverageRelationStatistics Valid=1040, Invalid=4510, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:20:03,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-06-05 05:20:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 2781. [2021-06-05 05:20:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2781 states, 2780 states have (on average 3.7827338129496404) internal successors, (10516), 2780 states have internal predecessors, (10516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 10516 transitions. [2021-06-05 05:20:03,171 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 10516 transitions. Word has length 24 [2021-06-05 05:20:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:03,171 INFO L482 AbstractCegarLoop]: Abstraction has 2781 states and 10516 transitions. [2021-06-05 05:20:03,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 10516 transitions. [2021-06-05 05:20:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:03,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:03,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:03,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:03,375 INFO L430 AbstractCegarLoop]: === Iteration 303 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:03,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1026428984, now seen corresponding path program 170 times [2021-06-05 05:20:03,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:03,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446868583] [2021-06-05 05:20:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:03,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:03,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446868583] [2021-06-05 05:20:03,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446868583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:03,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106137425] [2021-06-05 05:20:03,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:03,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:03,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:03,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:03,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:03,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:03,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:20:03,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:20:03,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:03,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:03,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:03,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:20:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:03,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106137425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:03,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:03,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:20:03,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743796349] [2021-06-05 05:20:03,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:20:03,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:20:03,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:03,866 INFO L87 Difference]: Start difference. First operand 2781 states and 10516 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:04,113 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 05:20:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:05,215 INFO L93 Difference]: Finished difference Result 3378 states and 12278 transitions. [2021-06-05 05:20:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:20:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:05,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:05,221 INFO L225 Difference]: With dead ends: 3378 [2021-06-05 05:20:05,221 INFO L226 Difference]: Without dead ends: 3328 [2021-06-05 05:20:05,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1274.9ms TimeCoverageRelationStatistics Valid=357, Invalid=2093, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:20:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-05 05:20:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2785. [2021-06-05 05:20:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 3.7819683908045976) internal successors, (10529), 2784 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 10529 transitions. [2021-06-05 05:20:05,261 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 10529 transitions. Word has length 24 [2021-06-05 05:20:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:05,261 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 10529 transitions. [2021-06-05 05:20:05,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 10529 transitions. [2021-06-05 05:20:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:05,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:05,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:05,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 05:20:05,465 INFO L430 AbstractCegarLoop]: === Iteration 304 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2054578844, now seen corresponding path program 171 times [2021-06-05 05:20:05,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:05,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890084171] [2021-06-05 05:20:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:05,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:05,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890084171] [2021-06-05 05:20:05,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890084171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:05,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942068494] [2021-06-05 05:20:05,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:05,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:20:05,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:05,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:05,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:05,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:05,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:05,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:05,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:05,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:05,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:20:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:05,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942068494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:05,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:05,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:05,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225277490] [2021-06-05 05:20:05,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:05,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:05,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:05,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:05,909 INFO L87 Difference]: Start difference. First operand 2785 states and 10529 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:06,227 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 05:20:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:07,503 INFO L93 Difference]: Finished difference Result 3256 states and 11952 transitions. [2021-06-05 05:20:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:20:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:07,508 INFO L225 Difference]: With dead ends: 3256 [2021-06-05 05:20:07,508 INFO L226 Difference]: Without dead ends: 3220 [2021-06-05 05:20:07,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1395.4ms TimeCoverageRelationStatistics Valid=371, Invalid=1981, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:20:07,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-06-05 05:20:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2790. [2021-06-05 05:20:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 3.7805665112943707) internal successors, (10544), 2789 states have internal predecessors, (10544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10544 transitions. [2021-06-05 05:20:07,550 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10544 transitions. Word has length 24 [2021-06-05 05:20:07,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:07,550 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10544 transitions. [2021-06-05 05:20:07,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10544 transitions. [2021-06-05 05:20:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:07,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:07,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:07,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 05:20:07,755 INFO L430 AbstractCegarLoop]: === Iteration 305 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1730992666, now seen corresponding path program 172 times [2021-06-05 05:20:07,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:07,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533593961] [2021-06-05 05:20:07,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:07,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533593961] [2021-06-05 05:20:07,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533593961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794434168] [2021-06-05 05:20:07,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:07,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:07,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:07,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:07,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:08,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:08,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:08,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:08,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:08,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:20:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:08,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794434168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:08,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:08,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:08,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967007456] [2021-06-05 05:20:08,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:08,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:08,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:08,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:08,114 INFO L87 Difference]: Start difference. First operand 2790 states and 10544 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:09,208 INFO L93 Difference]: Finished difference Result 3207 states and 11839 transitions. [2021-06-05 05:20:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:20:09,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:09,214 INFO L225 Difference]: With dead ends: 3207 [2021-06-05 05:20:09,214 INFO L226 Difference]: Without dead ends: 3182 [2021-06-05 05:20:09,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 980.3ms TimeCoverageRelationStatistics Valid=309, Invalid=1583, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:20:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-05 05:20:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2783. [2021-06-05 05:20:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.782530553558591) internal successors, (10523), 2782 states have internal predecessors, (10523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 10523 transitions. [2021-06-05 05:20:09,250 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 10523 transitions. Word has length 24 [2021-06-05 05:20:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:09,250 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 10523 transitions. [2021-06-05 05:20:09,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 10523 transitions. [2021-06-05 05:20:09,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:09,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:09,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:09,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-05 05:20:09,455 INFO L430 AbstractCegarLoop]: === Iteration 306 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:09,455 INFO L82 PathProgramCache]: Analyzing trace with hash -406982280, now seen corresponding path program 173 times [2021-06-05 05:20:09,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:09,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514858100] [2021-06-05 05:20:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:09,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:09,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514858100] [2021-06-05 05:20:09,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514858100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:09,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242836820] [2021-06-05 05:20:09,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:09,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:09,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:09,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:09,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:20:09,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:09,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:09,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:09,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:20:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:09,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242836820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:09,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:09,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:20:09,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133195688] [2021-06-05 05:20:09,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:09,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:09,838 INFO L87 Difference]: Start difference. First operand 2783 states and 10523 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:10,076 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 05:20:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:11,460 INFO L93 Difference]: Finished difference Result 3338 states and 12184 transitions. [2021-06-05 05:20:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:20:11,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:11,466 INFO L225 Difference]: With dead ends: 3338 [2021-06-05 05:20:11,466 INFO L226 Difference]: Without dead ends: 3302 [2021-06-05 05:20:11,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1302.7ms TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:20:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-06-05 05:20:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 2785. [2021-06-05 05:20:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 3.7819683908045976) internal successors, (10529), 2784 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 10529 transitions. [2021-06-05 05:20:11,506 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 10529 transitions. Word has length 24 [2021-06-05 05:20:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:11,506 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 10529 transitions. [2021-06-05 05:20:11,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 10529 transitions. [2021-06-05 05:20:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:11,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:11,510 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:11,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:11,710 INFO L430 AbstractCegarLoop]: === Iteration 307 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:11,710 INFO L82 PathProgramCache]: Analyzing trace with hash -189557394, now seen corresponding path program 174 times [2021-06-05 05:20:11,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:11,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004391232] [2021-06-05 05:20:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:11,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:11,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004391232] [2021-06-05 05:20:11,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004391232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:11,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814736035] [2021-06-05 05:20:11,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:11,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:20:11,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:11,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:20:11,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:11,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:12,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:12,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 05:20:12,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:12,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:12,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:12,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:350 [2021-06-05 05:20:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:12,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814736035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:12,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:12,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:20:12,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492389613] [2021-06-05 05:20:12,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:20:12,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:12,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:20:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:12,291 INFO L87 Difference]: Start difference. First operand 2785 states and 10529 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:12,695 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-06-05 05:20:13,047 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-06-05 05:20:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:14,500 INFO L93 Difference]: Finished difference Result 3326 states and 12143 transitions. [2021-06-05 05:20:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:20:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:14,506 INFO L225 Difference]: With dead ends: 3326 [2021-06-05 05:20:14,506 INFO L226 Difference]: Without dead ends: 3290 [2021-06-05 05:20:14,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 2016.0ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:20:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-06-05 05:20:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2794. [2021-06-05 05:20:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 3.779090583601862) internal successors, (10555), 2793 states have internal predecessors, (10555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 10555 transitions. [2021-06-05 05:20:14,543 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 10555 transitions. Word has length 24 [2021-06-05 05:20:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:14,544 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 10555 transitions. [2021-06-05 05:20:14,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 10555 transitions. [2021-06-05 05:20:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:14,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:14,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:14,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 05:20:14,763 INFO L430 AbstractCegarLoop]: === Iteration 308 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:14,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1023295834, now seen corresponding path program 175 times [2021-06-05 05:20:14,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:14,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879485138] [2021-06-05 05:20:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:14,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:14,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879485138] [2021-06-05 05:20:14,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879485138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:14,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508262907] [2021-06-05 05:20:14,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:14,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:15,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:15,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:15,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:15,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:15,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:20:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:15,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508262907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:15,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:15,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507774362] [2021-06-05 05:20:15,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:15,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:15,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:15,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:15,167 INFO L87 Difference]: Start difference. First operand 2794 states and 10555 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:16,494 INFO L93 Difference]: Finished difference Result 3320 states and 12153 transitions. [2021-06-05 05:20:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:20:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:16,499 INFO L225 Difference]: With dead ends: 3320 [2021-06-05 05:20:16,499 INFO L226 Difference]: Without dead ends: 3296 [2021-06-05 05:20:16,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1126.6ms TimeCoverageRelationStatistics Valid=371, Invalid=2079, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:20:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-05 05:20:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2790. [2021-06-05 05:20:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 3.779849408390104) internal successors, (10542), 2789 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10542 transitions. [2021-06-05 05:20:16,537 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10542 transitions. Word has length 24 [2021-06-05 05:20:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:16,537 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10542 transitions. [2021-06-05 05:20:16,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10542 transitions. [2021-06-05 05:20:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:16,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:16,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:16,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 05:20:16,741 INFO L430 AbstractCegarLoop]: === Iteration 309 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1855921234, now seen corresponding path program 176 times [2021-06-05 05:20:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:16,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336750716] [2021-06-05 05:20:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:16,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:16,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336750716] [2021-06-05 05:20:16,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336750716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:16,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162121736] [2021-06-05 05:20:16,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:16,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:16,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:16,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:16,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:16,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:16,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:17,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:17,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:17,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:17,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162121736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:17,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:17,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:17,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547483761] [2021-06-05 05:20:17,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:17,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:17,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:17,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:17,106 INFO L87 Difference]: Start difference. First operand 2790 states and 10542 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:17,381 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 05:20:17,769 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-06-05 05:20:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:18,576 INFO L93 Difference]: Finished difference Result 3245 states and 11918 transitions. [2021-06-05 05:20:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:20:18,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:18,582 INFO L225 Difference]: With dead ends: 3245 [2021-06-05 05:20:18,582 INFO L226 Difference]: Without dead ends: 3219 [2021-06-05 05:20:18,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1223.5ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:20:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2021-06-05 05:20:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 2794. [2021-06-05 05:20:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 3.778374507697816) internal successors, (10553), 2793 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 10553 transitions. [2021-06-05 05:20:18,620 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 10553 transitions. Word has length 24 [2021-06-05 05:20:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:18,620 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 10553 transitions. [2021-06-05 05:20:18,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 10553 transitions. [2021-06-05 05:20:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:18,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:18,624 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:18,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 05:20:18,825 INFO L430 AbstractCegarLoop]: === Iteration 310 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1532335056, now seen corresponding path program 177 times [2021-06-05 05:20:18,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:18,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049348177] [2021-06-05 05:20:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:18,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:18,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049348177] [2021-06-05 05:20:18,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049348177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:18,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996000858] [2021-06-05 05:20:18,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:18,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:20:18,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:18,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:18,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:19,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:19,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:19,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:19,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:19,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:19,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:19,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996000858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:19,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:19,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:19,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018500474] [2021-06-05 05:20:19,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:19,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:19,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:19,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:19,193 INFO L87 Difference]: Start difference. First operand 2794 states and 10553 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:19,457 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 05:20:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:20,581 INFO L93 Difference]: Finished difference Result 3212 states and 11807 transitions. [2021-06-05 05:20:20,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:20:20,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:20,586 INFO L225 Difference]: With dead ends: 3212 [2021-06-05 05:20:20,586 INFO L226 Difference]: Without dead ends: 3194 [2021-06-05 05:20:20,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1191.9ms TimeCoverageRelationStatistics Valid=338, Invalid=1824, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:20:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2021-06-05 05:20:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 2797. [2021-06-05 05:20:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.7775393419170245) internal successors, (10562), 2796 states have internal predecessors, (10562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 10562 transitions. [2021-06-05 05:20:20,626 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 10562 transitions. Word has length 24 [2021-06-05 05:20:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:20,627 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 10562 transitions. [2021-06-05 05:20:20,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 10562 transitions. [2021-06-05 05:20:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:20,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:20,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:20,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:20,831 INFO L430 AbstractCegarLoop]: === Iteration 311 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:20,831 INFO L82 PathProgramCache]: Analyzing trace with hash 153409066, now seen corresponding path program 178 times [2021-06-05 05:20:20,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:20,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841399984] [2021-06-05 05:20:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:20,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:20,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841399984] [2021-06-05 05:20:20,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841399984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:20,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412007523] [2021-06-05 05:20:20,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:21,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:21,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:21,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:21,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:21,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:21,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:21,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:21,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:21,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:21,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412007523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:21,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:21,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:20:21,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53817335] [2021-06-05 05:20:21,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:20:21,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:21,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:20:21,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:20:21,162 INFO L87 Difference]: Start difference. First operand 2797 states and 10562 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:22,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:22,297 INFO L93 Difference]: Finished difference Result 3156 states and 11659 transitions. [2021-06-05 05:20:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:20:22,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:22,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:22,301 INFO L225 Difference]: With dead ends: 3156 [2021-06-05 05:20:22,301 INFO L226 Difference]: Without dead ends: 3139 [2021-06-05 05:20:22,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 932.6ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:20:22,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-06-05 05:20:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 2791. [2021-06-05 05:20:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.7795698924731185) internal successors, (10545), 2790 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-05 05:20:22,335 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-05 05:20:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:22,335 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-05 05:20:22,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-05 05:20:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:22,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:22,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:22,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 05:20:22,539 INFO L430 AbstractCegarLoop]: === Iteration 312 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:22,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1558844418, now seen corresponding path program 179 times [2021-06-05 05:20:22,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:22,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10232379] [2021-06-05 05:20:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:22,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:22,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10232379] [2021-06-05 05:20:22,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10232379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:22,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127482806] [2021-06-05 05:20:22,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:22,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:22,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:22,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:22,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:22,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:22,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:22,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:22,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:22,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127482806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:22,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:22,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:22,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301462879] [2021-06-05 05:20:22,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:22,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:22,868 INFO L87 Difference]: Start difference. First operand 2791 states and 10545 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:24,022 INFO L93 Difference]: Finished difference Result 3273 states and 12003 transitions. [2021-06-05 05:20:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:20:24,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:24,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:24,028 INFO L225 Difference]: With dead ends: 3273 [2021-06-05 05:20:24,028 INFO L226 Difference]: Without dead ends: 3247 [2021-06-05 05:20:24,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 919.0ms TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:20:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-06-05 05:20:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2791. [2021-06-05 05:20:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.7795698924731185) internal successors, (10545), 2790 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-05 05:20:24,067 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-05 05:20:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:24,067 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-05 05:20:24,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-05 05:20:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:24,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:24,071 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:24,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 05:20:24,271 INFO L430 AbstractCegarLoop]: === Iteration 313 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:24,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:24,271 INFO L82 PathProgramCache]: Analyzing trace with hash 945261704, now seen corresponding path program 180 times [2021-06-05 05:20:24,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:24,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513463550] [2021-06-05 05:20:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:24,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:24,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513463550] [2021-06-05 05:20:24,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513463550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:24,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447791666] [2021-06-05 05:20:24,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:24,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:20:24,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:24,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:24,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:24,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:24,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:24,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:24,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:24,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:24,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447791666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:24,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:24,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:24,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498168214] [2021-06-05 05:20:24,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:24,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:24,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:24,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:24,568 INFO L87 Difference]: Start difference. First operand 2791 states and 10545 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:25,506 INFO L93 Difference]: Finished difference Result 3237 states and 11894 transitions. [2021-06-05 05:20:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:20:25,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:25,511 INFO L225 Difference]: With dead ends: 3237 [2021-06-05 05:20:25,511 INFO L226 Difference]: Without dead ends: 3215 [2021-06-05 05:20:25,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:20:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-06-05 05:20:25,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2791. [2021-06-05 05:20:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.7795698924731185) internal successors, (10545), 2790 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-05 05:20:25,546 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-05 05:20:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:25,546 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-05 05:20:25,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-05 05:20:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:25,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:25,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:25,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 05:20:25,769 INFO L430 AbstractCegarLoop]: === Iteration 314 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1622816248, now seen corresponding path program 181 times [2021-06-05 05:20:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:25,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227887318] [2021-06-05 05:20:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:25,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:25,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227887318] [2021-06-05 05:20:25,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227887318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:25,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543754580] [2021-06-05 05:20:25,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:25,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:26,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:26,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:26,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:26,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:26,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:26,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543754580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:26,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:26,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:26,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307081362] [2021-06-05 05:20:26,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:26,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:26,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:26,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:26,100 INFO L87 Difference]: Start difference. First operand 2791 states and 10545 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:27,212 INFO L93 Difference]: Finished difference Result 3213 states and 11832 transitions. [2021-06-05 05:20:27,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:20:27,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:27,218 INFO L225 Difference]: With dead ends: 3213 [2021-06-05 05:20:27,218 INFO L226 Difference]: Without dead ends: 3190 [2021-06-05 05:20:27,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:20:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-06-05 05:20:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2793. [2021-06-05 05:20:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 3.7786532951289398) internal successors, (10550), 2792 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 10550 transitions. [2021-06-05 05:20:27,252 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 10550 transitions. Word has length 24 [2021-06-05 05:20:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:27,253 INFO L482 AbstractCegarLoop]: Abstraction has 2793 states and 10550 transitions. [2021-06-05 05:20:27,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 10550 transitions. [2021-06-05 05:20:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:27,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:27,256 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:27,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:27,456 INFO L430 AbstractCegarLoop]: === Iteration 315 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:27,457 INFO L82 PathProgramCache]: Analyzing trace with hash -643401800, now seen corresponding path program 182 times [2021-06-05 05:20:27,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:27,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662984466] [2021-06-05 05:20:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:27,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:27,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662984466] [2021-06-05 05:20:27,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662984466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:27,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140547302] [2021-06-05 05:20:27,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:27,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:27,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:27,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:27,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:27,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:27,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:27,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:27,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:27,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140547302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:27,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:27,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:27,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11074942] [2021-06-05 05:20:27,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:27,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:27,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:27,783 INFO L87 Difference]: Start difference. First operand 2793 states and 10550 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:28,744 INFO L93 Difference]: Finished difference Result 3218 states and 11844 transitions. [2021-06-05 05:20:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:20:28,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:28,749 INFO L225 Difference]: With dead ends: 3218 [2021-06-05 05:20:28,750 INFO L226 Difference]: Without dead ends: 3196 [2021-06-05 05:20:28,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 824.5ms TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:20:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-06-05 05:20:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2790. [2021-06-05 05:20:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 3.779849408390104) internal successors, (10542), 2789 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10542 transitions. [2021-06-05 05:20:28,786 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10542 transitions. Word has length 24 [2021-06-05 05:20:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:28,787 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10542 transitions. [2021-06-05 05:20:28,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10542 transitions. [2021-06-05 05:20:28,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:28,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:28,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:28,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 05:20:28,991 INFO L430 AbstractCegarLoop]: === Iteration 316 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:28,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:28,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1889346820, now seen corresponding path program 99 times [2021-06-05 05:20:28,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:28,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638194245] [2021-06-05 05:20:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:29,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:29,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638194245] [2021-06-05 05:20:29,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638194245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:29,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598393491] [2021-06-05 05:20:29,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:29,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:20:29,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:29,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:29,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:29,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:29,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:29,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:29,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:29,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:20:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:29,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598393491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:29,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:29,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:29,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81450808] [2021-06-05 05:20:29,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:29,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:29,359 INFO L87 Difference]: Start difference. First operand 2790 states and 10542 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:32,714 INFO L93 Difference]: Finished difference Result 4181 states and 14688 transitions. [2021-06-05 05:20:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 05:20:32,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:32,720 INFO L225 Difference]: With dead ends: 4181 [2021-06-05 05:20:32,720 INFO L226 Difference]: Without dead ends: 4131 [2021-06-05 05:20:32,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 2927.5ms TimeCoverageRelationStatistics Valid=1278, Invalid=6378, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 05:20:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-06-05 05:20:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 2834. [2021-06-05 05:20:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2833 states have (on average 3.7871514295799504) internal successors, (10729), 2833 states have internal predecessors, (10729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 10729 transitions. [2021-06-05 05:20:32,760 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 10729 transitions. Word has length 24 [2021-06-05 05:20:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:32,760 INFO L482 AbstractCegarLoop]: Abstraction has 2834 states and 10729 transitions. [2021-06-05 05:20:32,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 10729 transitions. [2021-06-05 05:20:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:32,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:32,764 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:32,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:32,964 INFO L430 AbstractCegarLoop]: === Iteration 317 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:32,964 INFO L82 PathProgramCache]: Analyzing trace with hash 98485646, now seen corresponding path program 100 times [2021-06-05 05:20:32,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:32,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438848937] [2021-06-05 05:20:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:33,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:33,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438848937] [2021-06-05 05:20:33,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438848937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:33,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094373086] [2021-06-05 05:20:33,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:33,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:33,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:33,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:33,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:33,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:33,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:33,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:20:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:33,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094373086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:33,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:33,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:33,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194369121] [2021-06-05 05:20:33,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:33,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:33,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:33,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:33,279 INFO L87 Difference]: Start difference. First operand 2834 states and 10729 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:35,503 INFO L93 Difference]: Finished difference Result 3970 states and 14222 transitions. [2021-06-05 05:20:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:20:35,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:35,522 INFO L225 Difference]: With dead ends: 3970 [2021-06-05 05:20:35,522 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 05:20:35,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 1889.8ms TimeCoverageRelationStatistics Valid=1020, Invalid=4832, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:20:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 05:20:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2862. [2021-06-05 05:20:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.788885005242922) internal successors, (10840), 2861 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:35,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 10840 transitions. [2021-06-05 05:20:35,566 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 10840 transitions. Word has length 24 [2021-06-05 05:20:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:35,566 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 10840 transitions. [2021-06-05 05:20:35,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 10840 transitions. [2021-06-05 05:20:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:35,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:35,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:35,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:35,771 INFO L430 AbstractCegarLoop]: === Iteration 318 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash -168148038, now seen corresponding path program 183 times [2021-06-05 05:20:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:35,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310482346] [2021-06-05 05:20:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:35,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:35,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310482346] [2021-06-05 05:20:35,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310482346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:35,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017622429] [2021-06-05 05:20:35,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:35,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:20:35,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:35,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:20:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:36,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:20:36,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:36,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 05:20:36,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:36,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:36,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:36,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:54 [2021-06-05 05:20:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:36,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017622429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:36,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:36,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:20:36,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706892466] [2021-06-05 05:20:36,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:20:36,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:36,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:20:36,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:20:36,264 INFO L87 Difference]: Start difference. First operand 2862 states and 10840 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:36,744 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-06-05 05:20:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:38,700 INFO L93 Difference]: Finished difference Result 3928 states and 14042 transitions. [2021-06-05 05:20:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:20:38,700 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:38,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:38,706 INFO L225 Difference]: With dead ends: 3928 [2021-06-05 05:20:38,707 INFO L226 Difference]: Without dead ends: 3896 [2021-06-05 05:20:38,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 2103.2ms TimeCoverageRelationStatistics Valid=723, Invalid=4247, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:20:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-06-05 05:20:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 2879. [2021-06-05 05:20:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 3.791174426685198) internal successors, (10911), 2878 states have internal predecessors, (10911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 10911 transitions. [2021-06-05 05:20:38,747 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 10911 transitions. Word has length 24 [2021-06-05 05:20:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:38,747 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 10911 transitions. [2021-06-05 05:20:38,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 10911 transitions. [2021-06-05 05:20:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:38,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:38,751 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:38,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 05:20:38,952 INFO L430 AbstractCegarLoop]: === Iteration 319 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:38,952 INFO L82 PathProgramCache]: Analyzing trace with hash 155438140, now seen corresponding path program 184 times [2021-06-05 05:20:38,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:38,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236902142] [2021-06-05 05:20:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:39,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:39,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236902142] [2021-06-05 05:20:39,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236902142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:39,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519122449] [2021-06-05 05:20:39,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:39,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:39,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:39,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:39,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:39,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:39,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:39,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:39,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:39,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:20:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:39,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519122449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:39,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:39,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:39,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010966044] [2021-06-05 05:20:39,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:39,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:39,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:39,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:39,257 INFO L87 Difference]: Start difference. First operand 2879 states and 10911 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:41,619 INFO L93 Difference]: Finished difference Result 3884 states and 13980 transitions. [2021-06-05 05:20:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:20:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:41,625 INFO L225 Difference]: With dead ends: 3884 [2021-06-05 05:20:41,625 INFO L226 Difference]: Without dead ends: 3862 [2021-06-05 05:20:41,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 1997.9ms TimeCoverageRelationStatistics Valid=973, Invalid=5189, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:20:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-05 05:20:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2881. [2021-06-05 05:20:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.790277777777778) internal successors, (10916), 2880 states have internal predecessors, (10916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10916 transitions. [2021-06-05 05:20:41,663 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10916 transitions. Word has length 24 [2021-06-05 05:20:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:41,663 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10916 transitions. [2021-06-05 05:20:41,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10916 transitions. [2021-06-05 05:20:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:41,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:41,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:41,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 05:20:41,867 INFO L430 AbstractCegarLoop]: === Iteration 320 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:41,868 INFO L82 PathProgramCache]: Analyzing trace with hash 692360808, now seen corresponding path program 101 times [2021-06-05 05:20:41,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:41,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327223438] [2021-06-05 05:20:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:42,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:42,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327223438] [2021-06-05 05:20:42,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327223438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:42,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844460531] [2021-06-05 05:20:42,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:42,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:42,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:42,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:42,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:20:42,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:42,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:42,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:42,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:20:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:42,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844460531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:42,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:42,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:42,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604786130] [2021-06-05 05:20:42,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:42,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:42,167 INFO L87 Difference]: Start difference. First operand 2881 states and 10916 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:44,322 INFO L93 Difference]: Finished difference Result 4390 states and 15566 transitions. [2021-06-05 05:20:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:20:44,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:44,329 INFO L225 Difference]: With dead ends: 4390 [2021-06-05 05:20:44,329 INFO L226 Difference]: Without dead ends: 4345 [2021-06-05 05:20:44,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1823.3ms TimeCoverageRelationStatistics Valid=1003, Invalid=4399, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:20:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4345 states. [2021-06-05 05:20:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4345 to 3010. [2021-06-05 05:20:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.8062479228979726) internal successors, (11453), 3009 states have internal predecessors, (11453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 11453 transitions. [2021-06-05 05:20:44,376 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 11453 transitions. Word has length 24 [2021-06-05 05:20:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:44,376 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 11453 transitions. [2021-06-05 05:20:44,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 11453 transitions. [2021-06-05 05:20:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:44,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:44,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:44,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 05:20:44,580 INFO L430 AbstractCegarLoop]: === Iteration 321 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:44,581 INFO L82 PathProgramCache]: Analyzing trace with hash 487442674, now seen corresponding path program 185 times [2021-06-05 05:20:44,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:44,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779388330] [2021-06-05 05:20:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:44,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:44,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779388330] [2021-06-05 05:20:44,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779388330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:44,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40213603] [2021-06-05 05:20:44,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:44,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:20:44,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:44,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:44,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:20:44,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:44,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:44,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:44,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:20:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:44,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40213603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:44,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:44,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:44,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377133695] [2021-06-05 05:20:44,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:44,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:44,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:44,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:44,890 INFO L87 Difference]: Start difference. First operand 3010 states and 11453 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:47,294 INFO L93 Difference]: Finished difference Result 4523 states and 16142 transitions. [2021-06-05 05:20:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:20:47,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:47,302 INFO L225 Difference]: With dead ends: 4523 [2021-06-05 05:20:47,302 INFO L226 Difference]: Without dead ends: 4469 [2021-06-05 05:20:47,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 1974.3ms TimeCoverageRelationStatistics Valid=1011, Invalid=4539, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:20:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-05 05:20:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3113. [2021-06-05 05:20:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 3.8251928020565553) internal successors, (11904), 3112 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 11904 transitions. [2021-06-05 05:20:47,350 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 11904 transitions. Word has length 24 [2021-06-05 05:20:47,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:47,350 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 11904 transitions. [2021-06-05 05:20:47,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:47,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 11904 transitions. [2021-06-05 05:20:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:47,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:47,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:47,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 05:20:47,554 INFO L430 AbstractCegarLoop]: === Iteration 322 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:47,555 INFO L82 PathProgramCache]: Analyzing trace with hash -380303656, now seen corresponding path program 186 times [2021-06-05 05:20:47,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:47,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733187891] [2021-06-05 05:20:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:47,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:47,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733187891] [2021-06-05 05:20:47,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733187891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:47,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556471293] [2021-06-05 05:20:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:47,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:20:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:47,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:47,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:47,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:47,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:47,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:47,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:47,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:47,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:47,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556471293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:47,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:47,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:47,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105700960] [2021-06-05 05:20:47,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:47,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:47,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:47,900 INFO L87 Difference]: Start difference. First operand 3113 states and 11904 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:49,832 INFO L93 Difference]: Finished difference Result 4045 states and 14733 transitions. [2021-06-05 05:20:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:20:49,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:49,838 INFO L225 Difference]: With dead ends: 4045 [2021-06-05 05:20:49,838 INFO L226 Difference]: Without dead ends: 4036 [2021-06-05 05:20:49,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1611.7ms TimeCoverageRelationStatistics Valid=622, Invalid=3538, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:20:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4036 states. [2021-06-05 05:20:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4036 to 3118. [2021-06-05 05:20:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 3.8248315688161694) internal successors, (11922), 3117 states have internal predecessors, (11922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 11922 transitions. [2021-06-05 05:20:49,892 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 11922 transitions. Word has length 24 [2021-06-05 05:20:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:49,892 INFO L482 AbstractCegarLoop]: Abstraction has 3118 states and 11922 transitions. [2021-06-05 05:20:49,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 11922 transitions. [2021-06-05 05:20:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:49,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:49,897 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:50,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:50,097 INFO L430 AbstractCegarLoop]: === Iteration 323 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash -56717478, now seen corresponding path program 187 times [2021-06-05 05:20:50,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:50,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746340277] [2021-06-05 05:20:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:50,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:50,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746340277] [2021-06-05 05:20:50,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746340277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:50,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420534656] [2021-06-05 05:20:50,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:50,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:50,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:50,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:50,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:50,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:50,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:50,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420534656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:50,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:50,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:20:50,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888074092] [2021-06-05 05:20:50,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:20:50,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:50,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:20:50,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:20:50,396 INFO L87 Difference]: Start difference. First operand 3118 states and 11922 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:52,298 INFO L93 Difference]: Finished difference Result 4078 states and 14822 transitions. [2021-06-05 05:20:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:20:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:52,305 INFO L225 Difference]: With dead ends: 4078 [2021-06-05 05:20:52,305 INFO L226 Difference]: Without dead ends: 4045 [2021-06-05 05:20:52,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1566.6ms TimeCoverageRelationStatistics Valid=633, Invalid=3273, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:20:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2021-06-05 05:20:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 3135. [2021-06-05 05:20:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 3.829929802169751) internal successors, (12003), 3134 states have internal predecessors, (12003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 12003 transitions. [2021-06-05 05:20:52,352 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 12003 transitions. Word has length 24 [2021-06-05 05:20:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:52,352 INFO L482 AbstractCegarLoop]: Abstraction has 3135 states and 12003 transitions. [2021-06-05 05:20:52,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 12003 transitions. [2021-06-05 05:20:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:52,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:52,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:52,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 05:20:52,556 INFO L430 AbstractCegarLoop]: === Iteration 324 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash -83226840, now seen corresponding path program 188 times [2021-06-05 05:20:52,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:52,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112742583] [2021-06-05 05:20:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:52,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:52,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112742583] [2021-06-05 05:20:52,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112742583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:52,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736500650] [2021-06-05 05:20:52,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:52,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:20:52,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:52,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:52,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:52,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:52,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:52,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:52,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:52,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:52,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736500650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:52,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:52,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:52,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174157647] [2021-06-05 05:20:52,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:52,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:52,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:52,919 INFO L87 Difference]: Start difference. First operand 3135 states and 12003 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:55,600 INFO L93 Difference]: Finished difference Result 4435 states and 15824 transitions. [2021-06-05 05:20:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:20:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:55,608 INFO L225 Difference]: With dead ends: 4435 [2021-06-05 05:20:55,608 INFO L226 Difference]: Without dead ends: 4417 [2021-06-05 05:20:55,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 2051.6ms TimeCoverageRelationStatistics Valid=869, Invalid=5451, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:20:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4417 states. [2021-06-05 05:20:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4417 to 3143. [2021-06-05 05:20:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 3142 states have (on average 3.8309993634627624) internal successors, (12037), 3142 states have internal predecessors, (12037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 12037 transitions. [2021-06-05 05:20:55,675 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 12037 transitions. Word has length 24 [2021-06-05 05:20:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:55,675 INFO L482 AbstractCegarLoop]: Abstraction has 3143 states and 12037 transitions. [2021-06-05 05:20:55,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 12037 transitions. [2021-06-05 05:20:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:55,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:55,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:55,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-06-05 05:20:55,880 INFO L430 AbstractCegarLoop]: === Iteration 325 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:55,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:55,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1874088014, now seen corresponding path program 189 times [2021-06-05 05:20:55,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:55,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004362695] [2021-06-05 05:20:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:56,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:56,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004362695] [2021-06-05 05:20:56,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004362695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:56,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439413060] [2021-06-05 05:20:56,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:56,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:20:56,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:20:56,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:56,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:56,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:20:56,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:56,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:56,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:56,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:20:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:56,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439413060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:56,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:56,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:20:56,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401212946] [2021-06-05 05:20:56,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:20:56,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:56,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:20:56,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:20:56,256 INFO L87 Difference]: Start difference. First operand 3143 states and 12037 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:56,600 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 05:20:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:20:58,595 INFO L93 Difference]: Finished difference Result 4105 states and 14910 transitions. [2021-06-05 05:20:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:20:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:20:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:20:58,602 INFO L225 Difference]: With dead ends: 4105 [2021-06-05 05:20:58,602 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 05:20:58,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1997.0ms TimeCoverageRelationStatistics Valid=889, Invalid=4963, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:20:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 05:20:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3144. [2021-06-05 05:20:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 3.8307349665924275) internal successors, (12040), 3143 states have internal predecessors, (12040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 12040 transitions. [2021-06-05 05:20:58,657 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 12040 transitions. Word has length 24 [2021-06-05 05:20:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:20:58,657 INFO L482 AbstractCegarLoop]: Abstraction has 3144 states and 12040 transitions. [2021-06-05 05:20:58,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:20:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 12040 transitions. [2021-06-05 05:20:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:20:58,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:20:58,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:20:58,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 05:20:58,862 INFO L430 AbstractCegarLoop]: === Iteration 326 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:20:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:20:58,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1092254214, now seen corresponding path program 190 times [2021-06-05 05:20:58,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:20:58,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65090255] [2021-06-05 05:20:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:20:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:20:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:59,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:20:59,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65090255] [2021-06-05 05:20:59,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65090255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:59,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382746448] [2021-06-05 05:20:59,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:20:59,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:20:59,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:20:59,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:20:59,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:20:59,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:20:59,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:20:59,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:20:59,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:20:59,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:20:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:20:59,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382746448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:20:59,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:20:59,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:20:59,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555876375] [2021-06-05 05:20:59,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:20:59,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:20:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:20:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:20:59,195 INFO L87 Difference]: Start difference. First operand 3144 states and 12040 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:00,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:00,839 INFO L93 Difference]: Finished difference Result 3824 states and 14104 transitions. [2021-06-05 05:21:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:21:00,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:00,845 INFO L225 Difference]: With dead ends: 3824 [2021-06-05 05:21:00,845 INFO L226 Difference]: Without dead ends: 3811 [2021-06-05 05:21:00,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1386.4ms TimeCoverageRelationStatistics Valid=633, Invalid=3527, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:21:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2021-06-05 05:21:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3155. [2021-06-05 05:21:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 3.8332276474318325) internal successors, (12090), 3154 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 12090 transitions. [2021-06-05 05:21:00,886 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 12090 transitions. Word has length 24 [2021-06-05 05:21:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:00,886 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 12090 transitions. [2021-06-05 05:21:00,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 12090 transitions. [2021-06-05 05:21:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:00,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:00,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:01,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:01,091 INFO L430 AbstractCegarLoop]: === Iteration 327 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:01,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:01,091 INFO L82 PathProgramCache]: Analyzing trace with hash -147198670, now seen corresponding path program 191 times [2021-06-05 05:21:01,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:01,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151971279] [2021-06-05 05:21:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:01,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:01,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151971279] [2021-06-05 05:21:01,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151971279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:01,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557376770] [2021-06-05 05:21:01,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:01,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:01,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:01,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:01,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:01,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:01,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:01,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:21:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:01,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557376770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:01,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:01,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:21:01,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117351738] [2021-06-05 05:21:01,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:01,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:01,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:01,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:01,400 INFO L87 Difference]: Start difference. First operand 3155 states and 12090 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:02,783 INFO L93 Difference]: Finished difference Result 3946 states and 14542 transitions. [2021-06-05 05:21:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:21:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:02,789 INFO L225 Difference]: With dead ends: 3946 [2021-06-05 05:21:02,789 INFO L226 Difference]: Without dead ends: 3935 [2021-06-05 05:21:02,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1187.4ms TimeCoverageRelationStatistics Valid=476, Invalid=2386, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:21:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-06-05 05:21:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3159. [2021-06-05 05:21:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 3.8331222292590246) internal successors, (12105), 3158 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 12105 transitions. [2021-06-05 05:21:02,850 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 12105 transitions. Word has length 24 [2021-06-05 05:21:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:02,850 INFO L482 AbstractCegarLoop]: Abstraction has 3159 states and 12105 transitions. [2021-06-05 05:21:02,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 12105 transitions. [2021-06-05 05:21:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:02,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:02,854 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:03,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:03,055 INFO L430 AbstractCegarLoop]: === Iteration 328 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:03,055 INFO L82 PathProgramCache]: Analyzing trace with hash 832215778, now seen corresponding path program 192 times [2021-06-05 05:21:03,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:03,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555203264] [2021-06-05 05:21:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:03,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:03,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555203264] [2021-06-05 05:21:03,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555203264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:03,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623186516] [2021-06-05 05:21:03,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:03,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:03,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:03,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:03,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:03,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:03,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:21:03,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:03,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:03,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:03,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:21:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:03,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623186516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:03,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:03,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:03,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269483651] [2021-06-05 05:21:03,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:03,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:03,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:03,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:03,419 INFO L87 Difference]: Start difference. First operand 3159 states and 12105 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:03,749 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 05:21:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:05,537 INFO L93 Difference]: Finished difference Result 3997 states and 14609 transitions. [2021-06-05 05:21:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:21:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:05,544 INFO L225 Difference]: With dead ends: 3997 [2021-06-05 05:21:05,544 INFO L226 Difference]: Without dead ends: 3979 [2021-06-05 05:21:05,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1771.9ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:21:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-05 05:21:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3159. [2021-06-05 05:21:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 3.8331222292590246) internal successors, (12105), 3158 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 12105 transitions. [2021-06-05 05:21:05,590 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 12105 transitions. Word has length 24 [2021-06-05 05:21:05,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:05,590 INFO L482 AbstractCegarLoop]: Abstraction has 3159 states and 12105 transitions. [2021-06-05 05:21:05,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 12105 transitions. [2021-06-05 05:21:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:05,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:05,594 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:05,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:05,795 INFO L430 AbstractCegarLoop]: === Iteration 329 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:05,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1741961320, now seen corresponding path program 193 times [2021-06-05 05:21:05,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:05,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863560678] [2021-06-05 05:21:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:05,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:05,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863560678] [2021-06-05 05:21:05,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863560678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:05,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192288010] [2021-06-05 05:21:05,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:05,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:05,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:06,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:06,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:06,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:06,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:06,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:21:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:06,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192288010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:06,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:06,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:21:06,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775592363] [2021-06-05 05:21:06,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:21:06,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:06,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:21:06,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:21:06,116 INFO L87 Difference]: Start difference. First operand 3159 states and 12105 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:07,443 INFO L93 Difference]: Finished difference Result 3790 states and 14033 transitions. [2021-06-05 05:21:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:21:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:07,450 INFO L225 Difference]: With dead ends: 3790 [2021-06-05 05:21:07,450 INFO L226 Difference]: Without dead ends: 3779 [2021-06-05 05:21:07,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1120.3ms TimeCoverageRelationStatistics Valid=476, Invalid=2494, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:21:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-06-05 05:21:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3156. [2021-06-05 05:21:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 3.8339144215530903) internal successors, (12096), 3155 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:07,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 12096 transitions. [2021-06-05 05:21:07,501 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 12096 transitions. Word has length 24 [2021-06-05 05:21:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:07,502 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 12096 transitions. [2021-06-05 05:21:07,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 12096 transitions. [2021-06-05 05:21:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:07,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:07,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:07,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-05 05:21:07,722 INFO L430 AbstractCegarLoop]: === Iteration 330 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash -792728518, now seen corresponding path program 102 times [2021-06-05 05:21:07,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:07,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281446025] [2021-06-05 05:21:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:07,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:07,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281446025] [2021-06-05 05:21:07,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281446025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:07,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349378197] [2021-06-05 05:21:07,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:07,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:07,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:07,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:08,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:08,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:21:08,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:08,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:08,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:08,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:21:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:08,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349378197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:08,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:08,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:08,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372022893] [2021-06-05 05:21:08,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:08,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:08,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:08,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:08,073 INFO L87 Difference]: Start difference. First operand 3156 states and 12096 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:10,850 INFO L93 Difference]: Finished difference Result 4497 states and 16284 transitions. [2021-06-05 05:21:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:21:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:10,856 INFO L225 Difference]: With dead ends: 4497 [2021-06-05 05:21:10,856 INFO L226 Difference]: Without dead ends: 4464 [2021-06-05 05:21:10,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 2395.9ms TimeCoverageRelationStatistics Valid=1071, Invalid=6069, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:21:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2021-06-05 05:21:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 3272. [2021-06-05 05:21:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3271 states have (on average 3.8514215836135737) internal successors, (12598), 3271 states have internal predecessors, (12598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 12598 transitions. [2021-06-05 05:21:10,901 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 12598 transitions. Word has length 24 [2021-06-05 05:21:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:10,902 INFO L482 AbstractCegarLoop]: Abstraction has 3272 states and 12598 transitions. [2021-06-05 05:21:10,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 12598 transitions. [2021-06-05 05:21:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:10,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:10,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:11,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 05:21:11,106 INFO L430 AbstractCegarLoop]: === Iteration 331 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:11,106 INFO L82 PathProgramCache]: Analyzing trace with hash -997646652, now seen corresponding path program 194 times [2021-06-05 05:21:11,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:11,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989874464] [2021-06-05 05:21:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:11,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:11,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989874464] [2021-06-05 05:21:11,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989874464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:11,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890081900] [2021-06-05 05:21:11,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:11,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:11,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:11,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:11,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:11,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:11,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:21:11,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:11,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:11,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:11,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:21:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:11,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890081900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:11,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:11,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:11,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275234753] [2021-06-05 05:21:11,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:11,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:11,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:11,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:11,456 INFO L87 Difference]: Start difference. First operand 3272 states and 12598 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:13,813 INFO L93 Difference]: Finished difference Result 4691 states and 16892 transitions. [2021-06-05 05:21:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:21:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:13,821 INFO L225 Difference]: With dead ends: 4691 [2021-06-05 05:21:13,821 INFO L226 Difference]: Without dead ends: 4635 [2021-06-05 05:21:13,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 1981.7ms TimeCoverageRelationStatistics Valid=1006, Invalid=5000, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:21:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-06-05 05:21:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3315. [2021-06-05 05:21:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.859987929993965) internal successors, (12792), 3314 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 12792 transitions. [2021-06-05 05:21:13,873 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 12792 transitions. Word has length 24 [2021-06-05 05:21:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:13,873 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 12792 transitions. [2021-06-05 05:21:13,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 12792 transitions. [2021-06-05 05:21:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:13,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:13,877 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:14,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:14,078 INFO L430 AbstractCegarLoop]: === Iteration 332 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:14,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:14,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1420132378, now seen corresponding path program 195 times [2021-06-05 05:21:14,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:14,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280828646] [2021-06-05 05:21:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:14,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:14,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280828646] [2021-06-05 05:21:14,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280828646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:14,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613449165] [2021-06-05 05:21:14,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:14,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:14,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:14,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:21:14,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:14,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:14,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 56 [2021-06-05 05:21:14,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:14,448 INFO L628 ElimStorePlain]: treesize reduction 43, result has 56.6 percent of original size [2021-06-05 05:21:14,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:14,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:56 [2021-06-05 05:21:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:14,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613449165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:14,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:14,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:21:14,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203477093] [2021-06-05 05:21:14,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:14,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:14,602 INFO L87 Difference]: Start difference. First operand 3315 states and 12792 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:15,121 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-06-05 05:21:16,409 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 05:21:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:17,509 INFO L93 Difference]: Finished difference Result 4283 states and 15736 transitions. [2021-06-05 05:21:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:21:17,509 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:17,515 INFO L225 Difference]: With dead ends: 4283 [2021-06-05 05:21:17,515 INFO L226 Difference]: Without dead ends: 4266 [2021-06-05 05:21:17,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 2635.6ms TimeCoverageRelationStatistics Valid=891, Invalid=5429, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:21:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-06-05 05:21:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 3331. [2021-06-05 05:21:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 3330 states have (on average 3.863063063063063) internal successors, (12864), 3330 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 12864 transitions. [2021-06-05 05:21:17,566 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 12864 transitions. Word has length 24 [2021-06-05 05:21:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:17,566 INFO L482 AbstractCegarLoop]: Abstraction has 3331 states and 12864 transitions. [2021-06-05 05:21:17,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 12864 transitions. [2021-06-05 05:21:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:17,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:17,571 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:17,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:17,772 INFO L430 AbstractCegarLoop]: === Iteration 333 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash 265611744, now seen corresponding path program 196 times [2021-06-05 05:21:17,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:17,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100602806] [2021-06-05 05:21:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:17,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:17,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100602806] [2021-06-05 05:21:17,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100602806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:17,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441244533] [2021-06-05 05:21:17,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:17,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:17,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:17,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:18,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:18,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:18,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:18,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:18,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:21:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:18,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441244533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:18,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:18,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:21:18,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915285725] [2021-06-05 05:21:18,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:21:18,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:18,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:21:18,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:21:18,081 INFO L87 Difference]: Start difference. First operand 3331 states and 12864 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:20,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:20,036 INFO L93 Difference]: Finished difference Result 4180 states and 15490 transitions. [2021-06-05 05:21:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:21:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:20,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:20,043 INFO L225 Difference]: With dead ends: 4180 [2021-06-05 05:21:20,043 INFO L226 Difference]: Without dead ends: 4165 [2021-06-05 05:21:20,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1629.1ms TimeCoverageRelationStatistics Valid=759, Invalid=3933, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:21:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-05 05:21:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3335. [2021-06-05 05:21:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 3334 states have (on average 3.8629274145170966) internal successors, (12879), 3334 states have internal predecessors, (12879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 12879 transitions. [2021-06-05 05:21:20,102 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 12879 transitions. Word has length 24 [2021-06-05 05:21:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:20,102 INFO L482 AbstractCegarLoop]: Abstraction has 3335 states and 12879 transitions. [2021-06-05 05:21:20,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 12879 transitions. [2021-06-05 05:21:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:20,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:20,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:20,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:20,307 INFO L430 AbstractCegarLoop]: === Iteration 334 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:20,307 INFO L82 PathProgramCache]: Analyzing trace with hash -440717930, now seen corresponding path program 197 times [2021-06-05 05:21:20,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:20,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253551310] [2021-06-05 05:21:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:20,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:20,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253551310] [2021-06-05 05:21:20,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253551310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:20,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612343075] [2021-06-05 05:21:20,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:20,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:20,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:20,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:20,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:20,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:20,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:20,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:20,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:20,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:21:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:20,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612343075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:20,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:20,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:21:20,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570543926] [2021-06-05 05:21:20,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:20,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:20,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:20,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:20,631 INFO L87 Difference]: Start difference. First operand 3335 states and 12879 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:23,325 INFO L93 Difference]: Finished difference Result 4826 states and 17391 transitions. [2021-06-05 05:21:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 05:21:23,325 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:23,333 INFO L225 Difference]: With dead ends: 4826 [2021-06-05 05:21:23,333 INFO L226 Difference]: Without dead ends: 4795 [2021-06-05 05:21:23,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 2260.7ms TimeCoverageRelationStatistics Valid=1159, Invalid=6323, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:21:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-06-05 05:21:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 3365. [2021-06-05 05:21:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 3.8689060642092747) internal successors, (13015), 3364 states have internal predecessors, (13015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 13015 transitions. [2021-06-05 05:21:23,383 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 13015 transitions. Word has length 24 [2021-06-05 05:21:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:23,383 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 13015 transitions. [2021-06-05 05:21:23,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 13015 transitions. [2021-06-05 05:21:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:23,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:23,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:23,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:23,588 INFO L430 AbstractCegarLoop]: === Iteration 335 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:23,589 INFO L82 PathProgramCache]: Analyzing trace with hash -968550830, now seen corresponding path program 198 times [2021-06-05 05:21:23,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:23,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044408428] [2021-06-05 05:21:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:23,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:23,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044408428] [2021-06-05 05:21:23,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044408428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:23,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685186495] [2021-06-05 05:21:23,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:23,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:23,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:21:23,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:23,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:23,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:23,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:23,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 05:21:23,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:24,001 INFO L628 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2021-06-05 05:21:24,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:24,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 05:21:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:24,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685186495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:24,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:24,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:21:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702508560] [2021-06-05 05:21:24,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:24,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:24,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:24,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:24,073 INFO L87 Difference]: Start difference. First operand 3365 states and 13015 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:26,909 INFO L93 Difference]: Finished difference Result 4795 states and 17888 transitions. [2021-06-05 05:21:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:21:26,909 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:26,917 INFO L225 Difference]: With dead ends: 4795 [2021-06-05 05:21:26,917 INFO L226 Difference]: Without dead ends: 4786 [2021-06-05 05:21:26,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2269.1ms TimeCoverageRelationStatistics Valid=651, Invalid=3771, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:21:26,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-05 05:21:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 3369. [2021-06-05 05:21:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.8696555819477436) internal successors, (13033), 3368 states have internal predecessors, (13033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 13033 transitions. [2021-06-05 05:21:26,967 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 13033 transitions. Word has length 24 [2021-06-05 05:21:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:26,967 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 13033 transitions. [2021-06-05 05:21:26,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 13033 transitions. [2021-06-05 05:21:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:26,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:26,972 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:27,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-05 05:21:27,185 INFO L430 AbstractCegarLoop]: === Iteration 336 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1478066694, now seen corresponding path program 199 times [2021-06-05 05:21:27,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:27,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035785845] [2021-06-05 05:21:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:27,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:27,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035785845] [2021-06-05 05:21:27,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035785845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:27,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970798776] [2021-06-05 05:21:27,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:27,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:27,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:27,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:27,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:27,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:27,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:21:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:27,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970798776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:27,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:27,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:21:27,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311256580] [2021-06-05 05:21:27,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:27,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:27,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:27,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:27,581 INFO L87 Difference]: Start difference. First operand 3369 states and 13033 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:28,796 INFO L93 Difference]: Finished difference Result 4091 states and 15410 transitions. [2021-06-05 05:21:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:21:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:28,803 INFO L225 Difference]: With dead ends: 4091 [2021-06-05 05:21:28,803 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 05:21:28,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 939.1ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:21:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 05:21:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3374. [2021-06-05 05:21:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3374 states, 3373 states have (on average 3.868662911354877) internal successors, (13049), 3373 states have internal predecessors, (13049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3374 states to 3374 states and 13049 transitions. [2021-06-05 05:21:28,849 INFO L78 Accepts]: Start accepts. Automaton has 3374 states and 13049 transitions. Word has length 24 [2021-06-05 05:21:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:28,849 INFO L482 AbstractCegarLoop]: Abstraction has 3374 states and 13049 transitions. [2021-06-05 05:21:28,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3374 states and 13049 transitions. [2021-06-05 05:21:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:28,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:28,854 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:29,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:29,061 INFO L430 AbstractCegarLoop]: === Iteration 337 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1687604074, now seen corresponding path program 200 times [2021-06-05 05:21:29,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:29,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390713129] [2021-06-05 05:21:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:29,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:29,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390713129] [2021-06-05 05:21:29,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390713129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:29,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847707339] [2021-06-05 05:21:29,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:29,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:29,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:29,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:29,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:29,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:29,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 05:21:29,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:21:29,452 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-05 05:21:29,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:29,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 05:21:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:29,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847707339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:29,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:29,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:21:29,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733803473] [2021-06-05 05:21:29,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:21:29,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:21:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:21:29,506 INFO L87 Difference]: Start difference. First operand 3374 states and 13049 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:30,739 INFO L93 Difference]: Finished difference Result 3999 states and 15033 transitions. [2021-06-05 05:21:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:21:30,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:30,746 INFO L225 Difference]: With dead ends: 3999 [2021-06-05 05:21:30,746 INFO L226 Difference]: Without dead ends: 3981 [2021-06-05 05:21:30,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1049.8ms TimeCoverageRelationStatistics Valid=400, Invalid=2462, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:21:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-06-05 05:21:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3388. [2021-06-05 05:21:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 3.8665485680543252) internal successors, (13096), 3387 states have internal predecessors, (13096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 13096 transitions. [2021-06-05 05:21:30,789 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 13096 transitions. Word has length 24 [2021-06-05 05:21:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:30,789 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 13096 transitions. [2021-06-05 05:21:30,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 13096 transitions. [2021-06-05 05:21:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:30,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:30,794 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:30,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 05:21:30,994 INFO L430 AbstractCegarLoop]: === Iteration 338 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:30,994 INFO L82 PathProgramCache]: Analyzing trace with hash 41067672, now seen corresponding path program 201 times [2021-06-05 05:21:30,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:30,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340723887] [2021-06-05 05:21:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:31,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:31,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340723887] [2021-06-05 05:21:31,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340723887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:31,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98473937] [2021-06-05 05:21:31,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:31,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:31,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:31,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:31,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:31,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:31,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:21:31,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:31,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:31,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:31,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:21:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:31,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98473937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:31,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:31,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:21:31,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413399102] [2021-06-05 05:21:31,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:31,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:31,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:31,410 INFO L87 Difference]: Start difference. First operand 3388 states and 13096 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:33,315 INFO L93 Difference]: Finished difference Result 4200 states and 15720 transitions. [2021-06-05 05:21:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:21:33,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:33,322 INFO L225 Difference]: With dead ends: 4200 [2021-06-05 05:21:33,322 INFO L226 Difference]: Without dead ends: 4181 [2021-06-05 05:21:33,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1470.4ms TimeCoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:21:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-05 05:21:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3383. [2021-06-05 05:21:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 3382 states have (on average 3.868125369603785) internal successors, (13082), 3382 states have internal predecessors, (13082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 13082 transitions. [2021-06-05 05:21:33,375 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 13082 transitions. Word has length 24 [2021-06-05 05:21:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:33,376 INFO L482 AbstractCegarLoop]: Abstraction has 3383 states and 13082 transitions. [2021-06-05 05:21:33,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 13082 transitions. [2021-06-05 05:21:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:33,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:33,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:33,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:33,581 INFO L430 AbstractCegarLoop]: === Iteration 339 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash -987082188, now seen corresponding path program 202 times [2021-06-05 05:21:33,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:33,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977450465] [2021-06-05 05:21:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:33,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:33,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977450465] [2021-06-05 05:21:33,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977450465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:33,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205975931] [2021-06-05 05:21:33,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:33,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:33,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:33,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:33,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:33,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:33,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:33,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:33,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:21:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:33,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205975931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:33,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:33,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:21:33,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647334664] [2021-06-05 05:21:33,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:33,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:33,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:33,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:33,906 INFO L87 Difference]: Start difference. First operand 3383 states and 13082 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:34,803 INFO L93 Difference]: Finished difference Result 4061 states and 15309 transitions. [2021-06-05 05:21:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:21:34,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:34,809 INFO L225 Difference]: With dead ends: 4061 [2021-06-05 05:21:34,809 INFO L226 Difference]: Without dead ends: 4052 [2021-06-05 05:21:34,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 771.5ms TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:21:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-06-05 05:21:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 3392. [2021-06-05 05:21:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 3.8661161899144796) internal successors, (13110), 3391 states have internal predecessors, (13110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 13110 transitions. [2021-06-05 05:21:34,875 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 13110 transitions. Word has length 24 [2021-06-05 05:21:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:34,875 INFO L482 AbstractCegarLoop]: Abstraction has 3392 states and 13110 transitions. [2021-06-05 05:21:34,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 13110 transitions. [2021-06-05 05:21:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:34,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:34,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:35,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:35,081 INFO L430 AbstractCegarLoop]: === Iteration 340 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash -663496010, now seen corresponding path program 203 times [2021-06-05 05:21:35,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:35,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596262923] [2021-06-05 05:21:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:35,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:35,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596262923] [2021-06-05 05:21:35,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596262923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:35,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134870643] [2021-06-05 05:21:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:35,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:35,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:35,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:35,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:35,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:35,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:35,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:21:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:35,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134870643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:35,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:35,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:21:35,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135090983] [2021-06-05 05:21:35,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:35,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:35,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:35,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:35,415 INFO L87 Difference]: Start difference. First operand 3392 states and 13110 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:36,482 INFO L93 Difference]: Finished difference Result 4052 states and 15285 transitions. [2021-06-05 05:21:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:21:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:36,489 INFO L225 Difference]: With dead ends: 4052 [2021-06-05 05:21:36,489 INFO L226 Difference]: Without dead ends: 4041 [2021-06-05 05:21:36,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 830.6ms TimeCoverageRelationStatistics Valid=282, Invalid=1880, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:21:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4041 states. [2021-06-05 05:21:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4041 to 3382. [2021-06-05 05:21:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3381 states have (on average 3.868086364980775) internal successors, (13078), 3381 states have internal predecessors, (13078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 13078 transitions. [2021-06-05 05:21:36,534 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 13078 transitions. Word has length 24 [2021-06-05 05:21:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:36,534 INFO L482 AbstractCegarLoop]: Abstraction has 3382 states and 13078 transitions. [2021-06-05 05:21:36,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 13078 transitions. [2021-06-05 05:21:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:36,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:36,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:36,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 05:21:36,739 INFO L430 AbstractCegarLoop]: === Iteration 341 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1788704418, now seen corresponding path program 204 times [2021-06-05 05:21:36,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:36,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508050764] [2021-06-05 05:21:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:36,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:36,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508050764] [2021-06-05 05:21:36,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508050764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:36,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940546564] [2021-06-05 05:21:36,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:36,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:36,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:21:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:37,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:37,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:37,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 05:21:37,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:37,173 INFO L628 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2021-06-05 05:21:37,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:37,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 05:21:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:37,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940546564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:37,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:37,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:21:37,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236329871] [2021-06-05 05:21:37,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:37,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:37,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:37,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:37,245 INFO L87 Difference]: Start difference. First operand 3382 states and 13078 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:42,785 INFO L93 Difference]: Finished difference Result 6012 states and 21882 transitions. [2021-06-05 05:21:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:21:42,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:42,795 INFO L225 Difference]: With dead ends: 6012 [2021-06-05 05:21:42,795 INFO L226 Difference]: Without dead ends: 5983 [2021-06-05 05:21:42,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 4308.5ms TimeCoverageRelationStatistics Valid=1268, Invalid=6742, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:21:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2021-06-05 05:21:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 3413. [2021-06-05 05:21:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 05:21:42,854 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 05:21:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:42,854 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 05:21:42,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 05:21:42,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:42,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:42,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:43,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:43,059 INFO L430 AbstractCegarLoop]: === Iteration 342 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:43,059 INFO L82 PathProgramCache]: Analyzing trace with hash -52244372, now seen corresponding path program 205 times [2021-06-05 05:21:43,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:43,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853334548] [2021-06-05 05:21:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:43,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853334548] [2021-06-05 05:21:43,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853334548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629068514] [2021-06-05 05:21:43,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:43,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:43,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:43,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:43,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:43,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:43,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:43,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:21:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:43,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629068514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:43,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:43,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:21:43,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291551634] [2021-06-05 05:21:43,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:43,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:43,434 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:45,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:45,496 INFO L93 Difference]: Finished difference Result 4406 states and 16378 transitions. [2021-06-05 05:21:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:21:45,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:45,503 INFO L225 Difference]: With dead ends: 4406 [2021-06-05 05:21:45,503 INFO L226 Difference]: Without dead ends: 4388 [2021-06-05 05:21:45,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1497.5ms TimeCoverageRelationStatistics Valid=535, Invalid=3371, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:21:45,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4388 states. [2021-06-05 05:21:45,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4388 to 3416. [2021-06-05 05:21:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 3.8699853587115665) internal successors, (13216), 3415 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 13216 transitions. [2021-06-05 05:21:45,551 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 13216 transitions. Word has length 24 [2021-06-05 05:21:45,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:45,551 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 13216 transitions. [2021-06-05 05:21:45,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 13216 transitions. [2021-06-05 05:21:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:45,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:45,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:45,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 05:21:45,756 INFO L430 AbstractCegarLoop]: === Iteration 343 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2090131316, now seen corresponding path program 206 times [2021-06-05 05:21:45,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:45,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151260531] [2021-06-05 05:21:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:45,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:45,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151260531] [2021-06-05 05:21:45,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151260531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:45,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615754779] [2021-06-05 05:21:45,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:45,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:45,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:45,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:45,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:46,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:46,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:21:46,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:46,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:46,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:46,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:21:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:46,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615754779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:46,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:46,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:21:46,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401732011] [2021-06-05 05:21:46,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:46,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:46,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:46,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:46,155 INFO L87 Difference]: Start difference. First operand 3416 states and 13216 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:48,445 INFO L93 Difference]: Finished difference Result 4399 states and 16319 transitions. [2021-06-05 05:21:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:21:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:48,452 INFO L225 Difference]: With dead ends: 4399 [2021-06-05 05:21:48,452 INFO L226 Difference]: Without dead ends: 4370 [2021-06-05 05:21:48,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1871.8ms TimeCoverageRelationStatistics Valid=553, Invalid=3107, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:21:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-06-05 05:21:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3419. [2021-06-05 05:21:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 3.868929198361615) internal successors, (13224), 3418 states have internal predecessors, (13224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 13224 transitions. [2021-06-05 05:21:48,500 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 13224 transitions. Word has length 24 [2021-06-05 05:21:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:48,501 INFO L482 AbstractCegarLoop]: Abstraction has 3419 states and 13224 transitions. [2021-06-05 05:21:48,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 13224 transitions. [2021-06-05 05:21:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:48,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:48,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:48,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 05:21:48,706 INFO L430 AbstractCegarLoop]: === Iteration 344 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:48,706 INFO L82 PathProgramCache]: Analyzing trace with hash -268592468, now seen corresponding path program 207 times [2021-06-05 05:21:48,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:48,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700212981] [2021-06-05 05:21:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:48,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:48,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700212981] [2021-06-05 05:21:48,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700212981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:48,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919059394] [2021-06-05 05:21:48,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:48,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:48,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:48,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:49,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:21:49,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:49,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:49,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:49,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:49,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:21:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:49,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919059394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:49,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:49,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:21:49,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893924806] [2021-06-05 05:21:49,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:49,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:49,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:49,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:49,110 INFO L87 Difference]: Start difference. First operand 3419 states and 13224 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:51,002 INFO L93 Difference]: Finished difference Result 4271 states and 15932 transitions. [2021-06-05 05:21:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:21:51,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:51,009 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 05:21:51,009 INFO L226 Difference]: Without dead ends: 4242 [2021-06-05 05:21:51,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1513.2ms TimeCoverageRelationStatistics Valid=505, Invalid=3035, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:21:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2021-06-05 05:21:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 3415. [2021-06-05 05:21:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3414 states have (on average 3.87111892208553) internal successors, (13216), 3414 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13216 transitions. [2021-06-05 05:21:51,055 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13216 transitions. Word has length 24 [2021-06-05 05:21:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:51,055 INFO L482 AbstractCegarLoop]: Abstraction has 3415 states and 13216 transitions. [2021-06-05 05:21:51,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13216 transitions. [2021-06-05 05:21:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:51,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:51,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:51,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-05 05:21:51,260 INFO L430 AbstractCegarLoop]: === Iteration 345 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -445133900, now seen corresponding path program 208 times [2021-06-05 05:21:51,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:51,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034830437] [2021-06-05 05:21:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:51,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:51,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034830437] [2021-06-05 05:21:51,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034830437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:51,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473071422] [2021-06-05 05:21:51,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:51,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:21:51,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:51,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:51,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:51,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:51,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:51,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:51,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:51,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:21:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:51,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473071422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:51,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:51,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:21:51,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638266562] [2021-06-05 05:21:51,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:51,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:51,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:51,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:51,578 INFO L87 Difference]: Start difference. First operand 3415 states and 13216 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:52,505 INFO L93 Difference]: Finished difference Result 4098 states and 15416 transitions. [2021-06-05 05:21:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:21:52,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:52,512 INFO L225 Difference]: With dead ends: 4098 [2021-06-05 05:21:52,512 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 05:21:52,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 750.3ms TimeCoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:21:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 05:21:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3420. [2021-06-05 05:21:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.869552500731208) internal successors, (13230), 3419 states have internal predecessors, (13230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13230 transitions. [2021-06-05 05:21:52,559 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13230 transitions. Word has length 24 [2021-06-05 05:21:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:52,559 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13230 transitions. [2021-06-05 05:21:52,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13230 transitions. [2021-06-05 05:21:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:52,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:52,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:52,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:52,764 INFO L430 AbstractCegarLoop]: === Iteration 346 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:52,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1278872340, now seen corresponding path program 209 times [2021-06-05 05:21:52,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:52,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008780205] [2021-06-05 05:21:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:52,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:52,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008780205] [2021-06-05 05:21:52,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008780205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:52,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676349694] [2021-06-05 05:21:52,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:52,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:21:52,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:53,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:21:53,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:53,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:53,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:53,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:21:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:53,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676349694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:53,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:53,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:21:53,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345257226] [2021-06-05 05:21:53,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:21:53,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:53,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:21:53,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:21:53,088 INFO L87 Difference]: Start difference. First operand 3420 states and 13230 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:54,023 INFO L93 Difference]: Finished difference Result 4071 states and 15334 transitions. [2021-06-05 05:21:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:21:54,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:54,029 INFO L225 Difference]: With dead ends: 4071 [2021-06-05 05:21:54,029 INFO L226 Difference]: Without dead ends: 4061 [2021-06-05 05:21:54,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 786.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:21:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-05 05:21:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 3413. [2021-06-05 05:21:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 05:21:54,075 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 05:21:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:54,075 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 05:21:54,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 05:21:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:54,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:54,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:54,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-06-05 05:21:54,280 INFO L430 AbstractCegarLoop]: === Iteration 347 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:54,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1156910420, now seen corresponding path program 210 times [2021-06-05 05:21:54,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:54,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763498584] [2021-06-05 05:21:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:54,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:54,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763498584] [2021-06-05 05:21:54,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763498584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516847588] [2021-06-05 05:21:54,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:54,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:21:54,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:54,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:21:54,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:54,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:21:54,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:54,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 05:21:54,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:54,760 INFO L628 ElimStorePlain]: treesize reduction 46, result has 43.9 percent of original size [2021-06-05 05:21:54,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:54,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 05:21:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:54,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516847588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:54,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:54,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:21:54,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23819010] [2021-06-05 05:21:54,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:54,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:54,829 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:55,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:55,890 INFO L93 Difference]: Finished difference Result 3889 states and 14696 transitions. [2021-06-05 05:21:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:21:55,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:55,896 INFO L225 Difference]: With dead ends: 3889 [2021-06-05 05:21:55,896 INFO L226 Difference]: Without dead ends: 3880 [2021-06-05 05:21:55,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1007.4ms TimeCoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:21:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-06-05 05:21:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 3413. [2021-06-05 05:21:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 05:21:55,938 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 05:21:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:55,939 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 05:21:55,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 05:21:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:55,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:55,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:56,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:56,143 INFO L430 AbstractCegarLoop]: === Iteration 348 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:56,144 INFO L82 PathProgramCache]: Analyzing trace with hash 362223946, now seen corresponding path program 211 times [2021-06-05 05:21:56,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:56,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953163124] [2021-06-05 05:21:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:56,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:56,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953163124] [2021-06-05 05:21:56,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953163124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:56,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506156871] [2021-06-05 05:21:56,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:56,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:21:56,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:56,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:21:56,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:56,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:56,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:56,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:21:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:56,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506156871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:56,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:56,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:21:56,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301679386] [2021-06-05 05:21:56,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:56,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:56,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:56,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:56,490 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:57,518 INFO L93 Difference]: Finished difference Result 3907 states and 14738 transitions. [2021-06-05 05:21:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:21:57,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:57,525 INFO L225 Difference]: With dead ends: 3907 [2021-06-05 05:21:57,525 INFO L226 Difference]: Without dead ends: 3897 [2021-06-05 05:21:57,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 859.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:21:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2021-06-05 05:21:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3413. [2021-06-05 05:21:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 05:21:57,571 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 05:21:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:57,571 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 05:21:57,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 05:21:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:57,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:57,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:57,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 05:21:57,776 INFO L430 AbstractCegarLoop]: === Iteration 349 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:57,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:57,776 INFO L82 PathProgramCache]: Analyzing trace with hash -665925914, now seen corresponding path program 212 times [2021-06-05 05:21:57,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:57,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909301791] [2021-06-05 05:21:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:57,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:57,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909301791] [2021-06-05 05:21:57,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909301791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:57,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682855684] [2021-06-05 05:21:57,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:57,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:21:57,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:21:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:58,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:58,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:21:58,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:58,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:58,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:58,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:21:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:58,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682855684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:58,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:58,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:21:58,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323542015] [2021-06-05 05:21:58,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:21:58,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:58,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:21:58,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:21:58,167 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:21:58,925 INFO L93 Difference]: Finished difference Result 3822 states and 14477 transitions. [2021-06-05 05:21:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:21:58,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:21:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:21:58,931 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 05:21:58,931 INFO L226 Difference]: Without dead ends: 3813 [2021-06-05 05:21:58,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 713.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:21:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-05 05:21:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3417. [2021-06-05 05:21:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 3.870023419203747) internal successors, (13220), 3416 states have internal predecessors, (13220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 13220 transitions. [2021-06-05 05:21:58,976 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 13220 transitions. Word has length 24 [2021-06-05 05:21:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:21:58,976 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 13220 transitions. [2021-06-05 05:21:58,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:21:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 13220 transitions. [2021-06-05 05:21:58,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:21:58,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:21:58,981 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:21:59,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 05:21:59,181 INFO L430 AbstractCegarLoop]: === Iteration 350 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:21:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:21:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash -342339736, now seen corresponding path program 213 times [2021-06-05 05:21:59,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:21:59,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998559854] [2021-06-05 05:21:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:21:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:21:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:59,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:21:59,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998559854] [2021-06-05 05:21:59,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998559854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:59,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952810497] [2021-06-05 05:21:59,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:21:59,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:21:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:21:59,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:21:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:21:59,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:59,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:21:59,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:21:59,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:21:59,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:21:59,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 05:21:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:21:59,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952810497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:21:59,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:21:59,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:21:59,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513650571] [2021-06-05 05:21:59,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:21:59,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:21:59,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:21:59,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:21:59,713 INFO L87 Difference]: Start difference. First operand 3417 states and 13220 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:01,239 INFO L93 Difference]: Finished difference Result 3831 states and 14475 transitions. [2021-06-05 05:22:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:22:01,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:01,246 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 05:22:01,246 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 05:22:01,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1421.7ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:22:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 05:22:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3419. [2021-06-05 05:22:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 3.8695143358689292) internal successors, (13226), 3418 states have internal predecessors, (13226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 13226 transitions. [2021-06-05 05:22:01,296 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 13226 transitions. Word has length 24 [2021-06-05 05:22:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:01,296 INFO L482 AbstractCegarLoop]: Abstraction has 3419 states and 13226 transitions. [2021-06-05 05:22:01,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 13226 transitions. [2021-06-05 05:22:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:01,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:01,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:01,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 05:22:01,502 INFO L430 AbstractCegarLoop]: === Iteration 351 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:01,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:01,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1343404386, now seen corresponding path program 214 times [2021-06-05 05:22:01,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:01,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999000483] [2021-06-05 05:22:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:01,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:01,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999000483] [2021-06-05 05:22:01,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999000483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:01,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127946628] [2021-06-05 05:22:01,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:01,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:01,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:01,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:01,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:01,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:01,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:01,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:22:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:01,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127946628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:01,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:01,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:22:01,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077970932] [2021-06-05 05:22:01,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:22:01,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:22:01,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:22:01,824 INFO L87 Difference]: Start difference. First operand 3419 states and 13226 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:02,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:02,578 INFO L93 Difference]: Finished difference Result 3799 states and 14404 transitions. [2021-06-05 05:22:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:22:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:02,585 INFO L225 Difference]: With dead ends: 3799 [2021-06-05 05:22:02,585 INFO L226 Difference]: Without dead ends: 3788 [2021-06-05 05:22:02,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:22:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2021-06-05 05:22:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3413. [2021-06-05 05:22:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 05:22:02,636 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 05:22:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:02,636 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 05:22:02,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 05:22:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:02,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:02,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:02,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 05:22:02,841 INFO L430 AbstractCegarLoop]: === Iteration 352 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1891928856, now seen corresponding path program 215 times [2021-06-05 05:22:02,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:02,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480831091] [2021-06-05 05:22:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:03,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:03,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480831091] [2021-06-05 05:22:03,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480831091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:03,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868911906] [2021-06-05 05:22:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:03,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:03,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:03,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:03,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:03,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:03,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:03,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:22:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:03,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868911906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:03,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:03,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:22:03,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208150308] [2021-06-05 05:22:03,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:03,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:03,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:03,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:03,202 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:04,253 INFO L93 Difference]: Finished difference Result 3852 states and 14553 transitions. [2021-06-05 05:22:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:22:04,253 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:04,260 INFO L225 Difference]: With dead ends: 3852 [2021-06-05 05:22:04,260 INFO L226 Difference]: Without dead ends: 3843 [2021-06-05 05:22:04,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 847.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:22:04,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2021-06-05 05:22:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3410. [2021-06-05 05:22:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 3.8712232326195366) internal successors, (13197), 3409 states have internal predecessors, (13197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 13197 transitions. [2021-06-05 05:22:04,309 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 13197 transitions. Word has length 24 [2021-06-05 05:22:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:04,310 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 13197 transitions. [2021-06-05 05:22:04,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 13197 transitions. [2021-06-05 05:22:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:04,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:04,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:04,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-06-05 05:22:04,515 INFO L430 AbstractCegarLoop]: === Iteration 353 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:04,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:04,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1425885276, now seen corresponding path program 216 times [2021-06-05 05:22:04,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:04,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480510782] [2021-06-05 05:22:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:04,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:04,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480510782] [2021-06-05 05:22:04,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480510782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:04,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494325401] [2021-06-05 05:22:04,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:04,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:04,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:04,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:04,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:04,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:04,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:04,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 05:22:04,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:04,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:04,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:04,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 05:22:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:04,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494325401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:04,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:04,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:22:04,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019796297] [2021-06-05 05:22:04,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:22:04,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:22:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:22:04,995 INFO L87 Difference]: Start difference. First operand 3410 states and 13197 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:06,018 INFO L93 Difference]: Finished difference Result 3929 states and 14813 transitions. [2021-06-05 05:22:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:06,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:06,026 INFO L225 Difference]: With dead ends: 3929 [2021-06-05 05:22:06,026 INFO L226 Difference]: Without dead ends: 3911 [2021-06-05 05:22:06,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 804.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:22:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-06-05 05:22:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 3411. [2021-06-05 05:22:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 05:22:06,076 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 05:22:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:06,076 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 05:22:06,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 05:22:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:06,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:06,081 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:06,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:06,282 INFO L430 AbstractCegarLoop]: === Iteration 354 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash -82196782, now seen corresponding path program 217 times [2021-06-05 05:22:06,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:06,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770776557] [2021-06-05 05:22:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:06,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:06,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770776557] [2021-06-05 05:22:06,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770776557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:06,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502003984] [2021-06-05 05:22:06,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:06,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:06,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:06,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:06,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:06,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:06,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:06,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:22:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:06,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502003984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:06,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:06,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:22:06,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246797674] [2021-06-05 05:22:06,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:06,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:06,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:06,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:06,623 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:07,877 INFO L93 Difference]: Finished difference Result 3959 states and 14910 transitions. [2021-06-05 05:22:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:22:07,877 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:07,883 INFO L225 Difference]: With dead ends: 3959 [2021-06-05 05:22:07,884 INFO L226 Difference]: Without dead ends: 3940 [2021-06-05 05:22:07,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 939.6ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:22:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3940 states. [2021-06-05 05:22:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3940 to 3414. [2021-06-05 05:22:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.8702021681804863) internal successors, (13209), 3413 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13209 transitions. [2021-06-05 05:22:07,933 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13209 transitions. Word has length 24 [2021-06-05 05:22:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:07,933 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13209 transitions. [2021-06-05 05:22:07,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13209 transitions. [2021-06-05 05:22:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:07,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:07,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:08,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:08,138 INFO L430 AbstractCegarLoop]: === Iteration 355 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1854046730, now seen corresponding path program 218 times [2021-06-05 05:22:08,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:08,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999828318] [2021-06-05 05:22:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:08,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:08,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999828318] [2021-06-05 05:22:08,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999828318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:08,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991039709] [2021-06-05 05:22:08,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:08,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:08,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:08,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:08,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:08,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:08,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:22:08,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:08,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:08,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:08,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 05:22:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:08,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991039709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:08,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:08,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:22:08,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279493442] [2021-06-05 05:22:08,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:22:08,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:22:08,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:22:08,557 INFO L87 Difference]: Start difference. First operand 3414 states and 13209 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:10,047 INFO L93 Difference]: Finished difference Result 3982 states and 14970 transitions. [2021-06-05 05:22:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:22:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:10,053 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 05:22:10,053 INFO L226 Difference]: Without dead ends: 3963 [2021-06-05 05:22:10,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1277.9ms TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:22:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2021-06-05 05:22:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3412. [2021-06-05 05:22:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.871298739372618) internal successors, (13205), 3411 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-05 05:22:10,099 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-05 05:22:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:10,099 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-05 05:22:10,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-05 05:22:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:10,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:10,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:10,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:10,304 INFO L430 AbstractCegarLoop]: === Iteration 356 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:10,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1677505298, now seen corresponding path program 219 times [2021-06-05 05:22:10,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:10,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342137461] [2021-06-05 05:22:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:10,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:10,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342137461] [2021-06-05 05:22:10,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342137461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:10,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401560390] [2021-06-05 05:22:10,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:10,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:10,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:10,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:10,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:10,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:10,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:10,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:10,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:10,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:10,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 05:22:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:10,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401560390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:10,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:10,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:10,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326466441] [2021-06-05 05:22:10,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:10,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:10,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:10,664 INFO L87 Difference]: Start difference. First operand 3412 states and 13205 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:11,490 INFO L93 Difference]: Finished difference Result 3864 states and 14615 transitions. [2021-06-05 05:22:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:22:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:11,496 INFO L225 Difference]: With dead ends: 3864 [2021-06-05 05:22:11,496 INFO L226 Difference]: Without dead ends: 3855 [2021-06-05 05:22:11,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 740.3ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:22:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-06-05 05:22:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3415. [2021-06-05 05:22:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3414 states have (on average 3.8708260105448153) internal successors, (13215), 3414 states have internal predecessors, (13215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13215 transitions. [2021-06-05 05:22:11,541 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13215 transitions. Word has length 24 [2021-06-05 05:22:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:11,541 INFO L482 AbstractCegarLoop]: Abstraction has 3415 states and 13215 transitions. [2021-06-05 05:22:11,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13215 transitions. [2021-06-05 05:22:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:11,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:11,546 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:11,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 05:22:11,746 INFO L430 AbstractCegarLoop]: === Iteration 357 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:11,746 INFO L82 PathProgramCache]: Analyzing trace with hash 843766858, now seen corresponding path program 220 times [2021-06-05 05:22:11,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:11,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900260594] [2021-06-05 05:22:11,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:11,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:11,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900260594] [2021-06-05 05:22:11,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900260594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:11,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756104207] [2021-06-05 05:22:11,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:11,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:11,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:11,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:12,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:12,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:12,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:12,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:12,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:22:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:12,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756104207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:12,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:12,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:12,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659836583] [2021-06-05 05:22:12,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:12,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:12,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:12,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:12,085 INFO L87 Difference]: Start difference. First operand 3415 states and 13215 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:12,966 INFO L93 Difference]: Finished difference Result 3851 states and 14577 transitions. [2021-06-05 05:22:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:22:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:12,972 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 05:22:12,973 INFO L226 Difference]: Without dead ends: 3841 [2021-06-05 05:22:12,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 676.7ms TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:22:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-06-05 05:22:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3411. [2021-06-05 05:22:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 05:22:13,022 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 05:22:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:13,022 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 05:22:13,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 05:22:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:13,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:13,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:13,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-05 05:22:13,228 INFO L430 AbstractCegarLoop]: === Iteration 358 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash 564954386, now seen corresponding path program 221 times [2021-06-05 05:22:13,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:13,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805153723] [2021-06-05 05:22:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:13,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:13,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805153723] [2021-06-05 05:22:13,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805153723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:13,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458362862] [2021-06-05 05:22:13,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:13,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:13,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:13,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:13,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:13,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:22:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:13,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458362862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:13,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:13,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:22:13,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440824528] [2021-06-05 05:22:13,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:13,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:13,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:13,613 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:14,670 INFO L93 Difference]: Finished difference Result 3840 states and 14522 transitions. [2021-06-05 05:22:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:22:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:14,676 INFO L225 Difference]: With dead ends: 3840 [2021-06-05 05:22:14,676 INFO L226 Difference]: Without dead ends: 3831 [2021-06-05 05:22:14,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 821.7ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:22:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2021-06-05 05:22:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3412. [2021-06-05 05:22:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.871298739372618) internal successors, (13205), 3411 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-05 05:22:14,722 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-05 05:22:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:14,722 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-05 05:22:14,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-05 05:22:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:14,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:14,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:14,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 05:22:14,927 INFO L430 AbstractCegarLoop]: === Iteration 359 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:14,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2001341164, now seen corresponding path program 222 times [2021-06-05 05:22:14,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:14,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544300943] [2021-06-05 05:22:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:15,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544300943] [2021-06-05 05:22:15,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544300943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597739453] [2021-06-05 05:22:15,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:15,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:15,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:15,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:15,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:15,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 05:22:15,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:15,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:15,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:15,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 05:22:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:15,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597739453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:15,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:15,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:22:15,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131900079] [2021-06-05 05:22:15,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:22:15,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:15,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:22:15,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:22:15,382 INFO L87 Difference]: Start difference. First operand 3412 states and 13205 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:16,429 INFO L93 Difference]: Finished difference Result 3889 states and 14648 transitions. [2021-06-05 05:22:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:22:16,429 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:16,436 INFO L225 Difference]: With dead ends: 3889 [2021-06-05 05:22:16,436 INFO L226 Difference]: Without dead ends: 3870 [2021-06-05 05:22:16,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 787.0ms TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:22:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-06-05 05:22:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3413. [2021-06-05 05:22:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8713364595545134) internal successors, (13209), 3412 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13209 transitions. [2021-06-05 05:22:16,490 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13209 transitions. Word has length 24 [2021-06-05 05:22:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:16,490 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13209 transitions. [2021-06-05 05:22:16,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13209 transitions. [2021-06-05 05:22:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:16,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:16,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:16,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable688,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:16,695 INFO L430 AbstractCegarLoop]: === Iteration 360 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1265476272, now seen corresponding path program 223 times [2021-06-05 05:22:16,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:16,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838236345] [2021-06-05 05:22:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:16,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:16,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838236345] [2021-06-05 05:22:16,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838236345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:16,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801721380] [2021-06-05 05:22:16,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:16,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:16,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:16,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:16,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:16,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:16,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:16,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:22:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:17,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801721380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:17,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:17,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:17,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895910480] [2021-06-05 05:22:17,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:17,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:17,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:17,028 INFO L87 Difference]: Start difference. First operand 3413 states and 13209 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:17,917 INFO L93 Difference]: Finished difference Result 3870 states and 14613 transitions. [2021-06-05 05:22:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:22:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:17,924 INFO L225 Difference]: With dead ends: 3870 [2021-06-05 05:22:17,924 INFO L226 Difference]: Without dead ends: 3861 [2021-06-05 05:22:17,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 708.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:22:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2021-06-05 05:22:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3416. [2021-06-05 05:22:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 3.8708638360175693) internal successors, (13219), 3415 states have internal predecessors, (13219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 13219 transitions. [2021-06-05 05:22:17,971 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 13219 transitions. Word has length 24 [2021-06-05 05:22:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:17,971 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 13219 transitions. [2021-06-05 05:22:17,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 13219 transitions. [2021-06-05 05:22:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:17,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:17,976 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:18,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:18,176 INFO L430 AbstractCegarLoop]: === Iteration 361 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:18,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1589062450, now seen corresponding path program 224 times [2021-06-05 05:22:18,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:18,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136895301] [2021-06-05 05:22:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:18,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:18,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136895301] [2021-06-05 05:22:18,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136895301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:18,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900360357] [2021-06-05 05:22:18,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:18,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:18,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:18,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:18,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:18,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:18,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:22:18,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:18,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:18,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:18,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:22:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:18,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900360357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:18,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:18,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:18,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935038528] [2021-06-05 05:22:18,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:18,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:18,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:18,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:18,601 INFO L87 Difference]: Start difference. First operand 3416 states and 13219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:19,537 INFO L93 Difference]: Finished difference Result 3861 states and 14586 transitions. [2021-06-05 05:22:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:22:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:19,545 INFO L225 Difference]: With dead ends: 3861 [2021-06-05 05:22:19,545 INFO L226 Difference]: Without dead ends: 3848 [2021-06-05 05:22:19,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 805.1ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:22:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-06-05 05:22:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3411. [2021-06-05 05:22:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 05:22:19,613 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 05:22:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:19,613 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 05:22:19,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 05:22:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:19,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:19,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:19,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-06-05 05:22:19,818 INFO L430 AbstractCegarLoop]: === Iteration 362 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:19,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1707034270, now seen corresponding path program 225 times [2021-06-05 05:22:19,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:19,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212370851] [2021-06-05 05:22:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:19,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:19,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212370851] [2021-06-05 05:22:19,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212370851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:19,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870136559] [2021-06-05 05:22:19,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:20,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:20,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:20,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:22:20,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:20,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:20,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-06-05 05:22:20,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:20,207 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 05:22:20,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:20,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:43 [2021-06-05 05:22:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:20,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870136559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:20,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:20,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:22:20,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34990962] [2021-06-05 05:22:20,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:22:20,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:22:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:22:20,263 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:21,312 INFO L93 Difference]: Finished difference Result 3920 states and 14728 transitions. [2021-06-05 05:22:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:22:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:21,318 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 05:22:21,318 INFO L226 Difference]: Without dead ends: 3892 [2021-06-05 05:22:21,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 789.9ms TimeCoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:22:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-06-05 05:22:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3413. [2021-06-05 05:22:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8707502930832356) internal successors, (13207), 3412 states have internal predecessors, (13207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13207 transitions. [2021-06-05 05:22:21,363 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13207 transitions. Word has length 24 [2021-06-05 05:22:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:21,363 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13207 transitions. [2021-06-05 05:22:21,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13207 transitions. [2021-06-05 05:22:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:21,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:21,368 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:21,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 05:22:21,568 INFO L430 AbstractCegarLoop]: === Iteration 363 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:21,569 INFO L82 PathProgramCache]: Analyzing trace with hash -442736788, now seen corresponding path program 226 times [2021-06-05 05:22:21,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:21,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851845868] [2021-06-05 05:22:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:21,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:21,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851845868] [2021-06-05 05:22:21,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851845868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:21,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140867434] [2021-06-05 05:22:21,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:21,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:21,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:21,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:21,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:21,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:21,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:21,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:21,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:21,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:22:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:21,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140867434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:21,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:21,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:22:21,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409072454] [2021-06-05 05:22:21,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:21,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:21,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:21,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:21,903 INFO L87 Difference]: Start difference. First operand 3413 states and 13207 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:23,005 INFO L93 Difference]: Finished difference Result 3873 states and 14628 transitions. [2021-06-05 05:22:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:22:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:23,011 INFO L225 Difference]: With dead ends: 3873 [2021-06-05 05:22:23,011 INFO L226 Difference]: Without dead ends: 3854 [2021-06-05 05:22:23,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 833.0ms TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:22:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-06-05 05:22:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3412. [2021-06-05 05:22:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.871298739372618) internal successors, (13205), 3411 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-05 05:22:23,056 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-05 05:22:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:23,056 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-05 05:22:23,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-05 05:22:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:23,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:23,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:23,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:23,261 INFO L430 AbstractCegarLoop]: === Iteration 364 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash -619278220, now seen corresponding path program 227 times [2021-06-05 05:22:23,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:23,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22994909] [2021-06-05 05:22:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:23,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:23,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22994909] [2021-06-05 05:22:23,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22994909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:23,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436345826] [2021-06-05 05:22:23,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:23,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:23,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:23,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:23,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:23,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:23,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:23,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:23,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:23,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:22:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:23,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436345826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:23,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:23,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:23,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415930079] [2021-06-05 05:22:23,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:23,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:23,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:23,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:23,571 INFO L87 Difference]: Start difference. First operand 3412 states and 13205 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:24,346 INFO L93 Difference]: Finished difference Result 3806 states and 14423 transitions. [2021-06-05 05:22:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:22:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:24,353 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 05:22:24,353 INFO L226 Difference]: Without dead ends: 3797 [2021-06-05 05:22:24,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:22:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-06-05 05:22:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 3414. [2021-06-05 05:22:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.8713741576325815) internal successors, (13213), 3413 states have internal predecessors, (13213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13213 transitions. [2021-06-05 05:22:24,400 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13213 transitions. Word has length 24 [2021-06-05 05:22:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:24,400 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13213 transitions. [2021-06-05 05:22:24,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13213 transitions. [2021-06-05 05:22:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:24,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:24,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:24,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 05:22:24,606 INFO L430 AbstractCegarLoop]: === Iteration 365 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1453016660, now seen corresponding path program 228 times [2021-06-05 05:22:24,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:24,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727513446] [2021-06-05 05:22:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:24,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:24,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727513446] [2021-06-05 05:22:24,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727513446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:24,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834360560] [2021-06-05 05:22:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:24,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:22:24,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:24,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:24,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:24,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:24,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:24,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 05:22:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:24,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834360560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:24,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:24,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860277235] [2021-06-05 05:22:24,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:24,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:24,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:24,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:24,973 INFO L87 Difference]: Start difference. First operand 3414 states and 13213 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:25,794 INFO L93 Difference]: Finished difference Result 3783 states and 14356 transitions. [2021-06-05 05:22:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:25,794 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:25,800 INFO L225 Difference]: With dead ends: 3783 [2021-06-05 05:22:25,800 INFO L226 Difference]: Without dead ends: 3773 [2021-06-05 05:22:25,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 684.9ms TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:22:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-06-05 05:22:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 3411. [2021-06-05 05:22:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 05:22:25,845 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 05:22:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:25,845 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 05:22:25,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 05:22:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:25,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:25,850 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:26,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:26,050 INFO L430 AbstractCegarLoop]: === Iteration 366 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1240546540, now seen corresponding path program 229 times [2021-06-05 05:22:26,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:26,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726976262] [2021-06-05 05:22:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:26,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:26,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726976262] [2021-06-05 05:22:26,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726976262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:26,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999075710] [2021-06-05 05:22:26,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:26,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:26,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:26,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:26,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:26,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:26,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:22:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:26,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999075710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:26,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:26,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:22:26,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079438827] [2021-06-05 05:22:26,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:26,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:26,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:26,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:26,400 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:27,271 INFO L93 Difference]: Finished difference Result 3883 states and 14653 transitions. [2021-06-05 05:22:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:27,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:27,277 INFO L225 Difference]: With dead ends: 3883 [2021-06-05 05:22:27,277 INFO L226 Difference]: Without dead ends: 3864 [2021-06-05 05:22:27,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 718.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:22:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-05 05:22:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3411. [2021-06-05 05:22:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 05:22:27,322 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 05:22:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:27,322 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 05:22:27,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:27,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 05:22:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:27,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:27,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:27,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:27,528 INFO L430 AbstractCegarLoop]: === Iteration 367 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:27,528 INFO L82 PathProgramCache]: Analyzing trace with hash 212396680, now seen corresponding path program 230 times [2021-06-05 05:22:27,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:27,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9268070] [2021-06-05 05:22:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:27,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:27,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9268070] [2021-06-05 05:22:27,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9268070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:27,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715067026] [2021-06-05 05:22:27,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:27,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:27,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:27,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:27,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:27,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:27,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:22:27,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:27,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:27,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:27,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:22:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:27,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715067026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:27,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:27,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:27,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938863818] [2021-06-05 05:22:27,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:27,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:27,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:27,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:27,900 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:28,735 INFO L93 Difference]: Finished difference Result 3872 states and 14637 transitions. [2021-06-05 05:22:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:22:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:28,742 INFO L225 Difference]: With dead ends: 3872 [2021-06-05 05:22:28,742 INFO L226 Difference]: Without dead ends: 3862 [2021-06-05 05:22:28,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 754.0ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:22:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-05 05:22:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3414. [2021-06-05 05:22:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.8710811602695574) internal successors, (13212), 3413 states have internal predecessors, (13212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13212 transitions. [2021-06-05 05:22:28,788 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13212 transitions. Word has length 24 [2021-06-05 05:22:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:28,788 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13212 transitions. [2021-06-05 05:22:28,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13212 transitions. [2021-06-05 05:22:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:28,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:28,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:28,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:28,993 INFO L430 AbstractCegarLoop]: === Iteration 368 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:28,993 INFO L82 PathProgramCache]: Analyzing trace with hash 535982858, now seen corresponding path program 231 times [2021-06-05 05:22:28,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:28,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925967020] [2021-06-05 05:22:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:29,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:29,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925967020] [2021-06-05 05:22:29,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925967020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:29,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018349271] [2021-06-05 05:22:29,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:29,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:29,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:22:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:29,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:29,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:22:29,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:29,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:29,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:29,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 05:22:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:29,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018349271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:29,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:29,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:22:29,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021030280] [2021-06-05 05:22:29,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:22:29,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:22:29,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:22:29,492 INFO L87 Difference]: Start difference. First operand 3414 states and 13212 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:31,199 INFO L93 Difference]: Finished difference Result 4016 states and 14984 transitions. [2021-06-05 05:22:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:22:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:31,217 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 05:22:31,218 INFO L226 Difference]: Without dead ends: 3997 [2021-06-05 05:22:31,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1513.5ms TimeCoverageRelationStatistics Valid=413, Invalid=2343, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:22:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2021-06-05 05:22:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 3426. [2021-06-05 05:22:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 3.8703649635036497) internal successors, (13256), 3425 states have internal predecessors, (13256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 13256 transitions. [2021-06-05 05:22:31,262 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 13256 transitions. Word has length 24 [2021-06-05 05:22:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:31,262 INFO L482 AbstractCegarLoop]: Abstraction has 3426 states and 13256 transitions. [2021-06-05 05:22:31,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 13256 transitions. [2021-06-05 05:22:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:31,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:31,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:31,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:31,467 INFO L430 AbstractCegarLoop]: === Iteration 369 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:31,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2073240316, now seen corresponding path program 232 times [2021-06-05 05:22:31,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:31,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681261495] [2021-06-05 05:22:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:31,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:31,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681261495] [2021-06-05 05:22:31,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681261495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:31,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221077822] [2021-06-05 05:22:31,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:31,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:31,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:31,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:31,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:31,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:31,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:31,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:31,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:22:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:31,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221077822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:31,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:31,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:22:31,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381011617] [2021-06-05 05:22:31,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:22:31,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:31,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:22:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:22:31,772 INFO L87 Difference]: Start difference. First operand 3426 states and 13256 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:32,534 INFO L93 Difference]: Finished difference Result 3782 states and 14374 transitions. [2021-06-05 05:22:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:22:32,534 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:32,539 INFO L225 Difference]: With dead ends: 3782 [2021-06-05 05:22:32,539 INFO L226 Difference]: Without dead ends: 3767 [2021-06-05 05:22:32,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 600.0ms TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:22:32,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-06-05 05:22:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3420. [2021-06-05 05:22:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.870722433460076) internal successors, (13234), 3419 states have internal predecessors, (13234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13234 transitions. [2021-06-05 05:22:32,595 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13234 transitions. Word has length 24 [2021-06-05 05:22:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:32,595 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13234 transitions. [2021-06-05 05:22:32,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13234 transitions. [2021-06-05 05:22:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:32,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:32,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:32,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:32,800 INFO L430 AbstractCegarLoop]: === Iteration 370 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1859993244, now seen corresponding path program 233 times [2021-06-05 05:22:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:32,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267961120] [2021-06-05 05:22:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:32,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:32,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267961120] [2021-06-05 05:22:32,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267961120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:32,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028703012] [2021-06-05 05:22:32,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:32,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:32,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:33,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:33,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:33,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:33,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:33,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:22:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:33,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028703012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:33,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:33,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:22:33,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896994656] [2021-06-05 05:22:33,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:33,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:33,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:33,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:33,127 INFO L87 Difference]: Start difference. First operand 3420 states and 13234 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:34,098 INFO L93 Difference]: Finished difference Result 3906 states and 14738 transitions. [2021-06-05 05:22:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:34,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:34,104 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 05:22:34,105 INFO L226 Difference]: Without dead ends: 3887 [2021-06-05 05:22:34,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:22:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3887 states. [2021-06-05 05:22:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3887 to 3420. [2021-06-05 05:22:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.870722433460076) internal successors, (13234), 3419 states have internal predecessors, (13234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13234 transitions. [2021-06-05 05:22:34,147 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13234 transitions. Word has length 24 [2021-06-05 05:22:34,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:34,147 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13234 transitions. [2021-06-05 05:22:34,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13234 transitions. [2021-06-05 05:22:34,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:34,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:34,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:34,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-06-05 05:22:34,352 INFO L430 AbstractCegarLoop]: === Iteration 371 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2077418130, now seen corresponding path program 234 times [2021-06-05 05:22:34,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:34,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305299426] [2021-06-05 05:22:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:34,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:34,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305299426] [2021-06-05 05:22:34,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305299426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:34,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214126862] [2021-06-05 05:22:34,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:34,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:22:34,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:34,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:34,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:34,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:22:34,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:34,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:34,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:34,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:22:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:34,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214126862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:34,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:34,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:34,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539735317] [2021-06-05 05:22:34,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:34,724 INFO L87 Difference]: Start difference. First operand 3420 states and 13234 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:35,748 INFO L93 Difference]: Finished difference Result 3932 states and 14799 transitions. [2021-06-05 05:22:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:22:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:35,755 INFO L225 Difference]: With dead ends: 3932 [2021-06-05 05:22:35,755 INFO L226 Difference]: Without dead ends: 3913 [2021-06-05 05:22:35,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 929.5ms TimeCoverageRelationStatistics Valid=368, Invalid=1612, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:22:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2021-06-05 05:22:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3425. [2021-06-05 05:22:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 3424 states have (on average 3.8703271028037385) internal successors, (13252), 3424 states have internal predecessors, (13252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 13252 transitions. [2021-06-05 05:22:35,800 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 13252 transitions. Word has length 24 [2021-06-05 05:22:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:35,800 INFO L482 AbstractCegarLoop]: Abstraction has 3425 states and 13252 transitions. [2021-06-05 05:22:35,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:35,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 13252 transitions. [2021-06-05 05:22:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:35,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:35,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:36,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:36,005 INFO L430 AbstractCegarLoop]: === Iteration 372 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:36,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1243679690, now seen corresponding path program 235 times [2021-06-05 05:22:36,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:36,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627604285] [2021-06-05 05:22:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:36,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:36,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627604285] [2021-06-05 05:22:36,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627604285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:36,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745134809] [2021-06-05 05:22:36,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:36,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:36,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:36,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:36,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:36,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:36,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:36,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:22:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:36,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745134809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:36,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:36,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:36,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855450184] [2021-06-05 05:22:36,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:36,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:36,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:36,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:36,346 INFO L87 Difference]: Start difference. First operand 3425 states and 13252 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:37,013 INFO L93 Difference]: Finished difference Result 3894 states and 14709 transitions. [2021-06-05 05:22:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:22:37,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:37,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:37,019 INFO L225 Difference]: With dead ends: 3894 [2021-06-05 05:22:37,020 INFO L226 Difference]: Without dead ends: 3882 [2021-06-05 05:22:37,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:22:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-06-05 05:22:37,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3422. [2021-06-05 05:22:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3421 states have (on average 3.8705057000876937) internal successors, (13241), 3421 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 13241 transitions. [2021-06-05 05:22:37,067 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 13241 transitions. Word has length 24 [2021-06-05 05:22:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:37,067 INFO L482 AbstractCegarLoop]: Abstraction has 3422 states and 13241 transitions. [2021-06-05 05:22:37,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 13241 transitions. [2021-06-05 05:22:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:37,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:37,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:37,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-05 05:22:37,272 INFO L430 AbstractCegarLoop]: === Iteration 373 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash 411054290, now seen corresponding path program 236 times [2021-06-05 05:22:37,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:37,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747475718] [2021-06-05 05:22:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:37,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:37,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747475718] [2021-06-05 05:22:37,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747475718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:37,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860798719] [2021-06-05 05:22:37,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:37,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:37,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:37,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:37,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:37,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:37,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:22:37,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:37,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:37,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:37,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:22:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:37,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860798719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:37,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:37,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:37,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692560429] [2021-06-05 05:22:37,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:37,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:37,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:37,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:37,655 INFO L87 Difference]: Start difference. First operand 3422 states and 13241 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:38,597 INFO L93 Difference]: Finished difference Result 3835 states and 14527 transitions. [2021-06-05 05:22:38,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:22:38,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:38,603 INFO L225 Difference]: With dead ends: 3835 [2021-06-05 05:22:38,603 INFO L226 Difference]: Without dead ends: 3826 [2021-06-05 05:22:38,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 772.4ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:22:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-05 05:22:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 3424. [2021-06-05 05:22:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 3.8702892199824714) internal successors, (13248), 3423 states have internal predecessors, (13248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 13248 transitions. [2021-06-05 05:22:38,647 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 13248 transitions. Word has length 24 [2021-06-05 05:22:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:38,648 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 13248 transitions. [2021-06-05 05:22:38,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 13248 transitions. [2021-06-05 05:22:38,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:38,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:38,652 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:38,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:38,853 INFO L430 AbstractCegarLoop]: === Iteration 374 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash 734640468, now seen corresponding path program 237 times [2021-06-05 05:22:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:38,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735481664] [2021-06-05 05:22:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:39,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:39,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735481664] [2021-06-05 05:22:39,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735481664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:39,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46380911] [2021-06-05 05:22:39,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:39,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:22:39,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:39,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:39,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:39,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:39,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:39,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 05:22:39,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:39,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:39,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:39,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-05 05:22:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:39,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46380911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:39,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:39,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:22:39,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555817741] [2021-06-05 05:22:39,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:22:39,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:39,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:22:39,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:22:39,359 INFO L87 Difference]: Start difference. First operand 3424 states and 13248 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:40,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:40,626 INFO L93 Difference]: Finished difference Result 3901 states and 14689 transitions. [2021-06-05 05:22:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:22:40,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:40,633 INFO L225 Difference]: With dead ends: 3901 [2021-06-05 05:22:40,633 INFO L226 Difference]: Without dead ends: 3890 [2021-06-05 05:22:40,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1109.5ms TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:22:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-06-05 05:22:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3430. [2021-06-05 05:22:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8710994459025954) internal successors, (13274), 3429 states have internal predecessors, (13274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13274 transitions. [2021-06-05 05:22:40,683 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13274 transitions. Word has length 24 [2021-06-05 05:22:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:40,683 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13274 transitions. [2021-06-05 05:22:40,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13274 transitions. [2021-06-05 05:22:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:40,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:40,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:40,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 05:22:40,888 INFO L430 AbstractCegarLoop]: === Iteration 375 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:40,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1874582706, now seen corresponding path program 238 times [2021-06-05 05:22:40,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:40,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302940750] [2021-06-05 05:22:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:41,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:41,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302940750] [2021-06-05 05:22:41,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302940750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:41,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820490791] [2021-06-05 05:22:41,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:41,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:41,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:41,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:41,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:41,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:41,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:41,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:41,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:41,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:22:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:41,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820490791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:41,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:41,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:22:41,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515352168] [2021-06-05 05:22:41,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:22:41,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:41,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:22:41,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:22:41,229 INFO L87 Difference]: Start difference. First operand 3430 states and 13274 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:41,787 INFO L93 Difference]: Finished difference Result 3785 states and 14377 transitions. [2021-06-05 05:22:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:22:41,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:41,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:41,793 INFO L225 Difference]: With dead ends: 3785 [2021-06-05 05:22:41,793 INFO L226 Difference]: Without dead ends: 3774 [2021-06-05 05:22:41,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:22:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-06-05 05:22:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3429. [2021-06-05 05:22:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.870770128354726) internal successors, (13269), 3428 states have internal predecessors, (13269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 13269 transitions. [2021-06-05 05:22:41,837 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 13269 transitions. Word has length 24 [2021-06-05 05:22:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:41,837 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 13269 transitions. [2021-06-05 05:22:41,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 13269 transitions. [2021-06-05 05:22:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:41,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:41,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:42,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,364 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:42,042 INFO L430 AbstractCegarLoop]: === Iteration 376 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:42,043 INFO L82 PathProgramCache]: Analyzing trace with hash 708131106, now seen corresponding path program 239 times [2021-06-05 05:22:42,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:42,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986474835] [2021-06-05 05:22:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:42,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:42,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986474835] [2021-06-05 05:22:42,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986474835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:42,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130076686] [2021-06-05 05:22:42,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:42,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:22:42,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:42,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:42,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:42,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:42,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:42,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:42,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:22:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:42,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130076686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:42,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:42,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:42,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753776260] [2021-06-05 05:22:42,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:42,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:42,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:42,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:42,367 INFO L87 Difference]: Start difference. First operand 3429 states and 13269 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:43,185 INFO L93 Difference]: Finished difference Result 3822 states and 14496 transitions. [2021-06-05 05:22:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:22:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:43,193 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 05:22:43,193 INFO L226 Difference]: Without dead ends: 3813 [2021-06-05 05:22:43,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 631.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:22:43,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-05 05:22:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3430. [2021-06-05 05:22:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 05:22:43,246 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 05:22:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:43,246 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 05:22:43,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 05:22:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:43,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:43,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:43,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:43,451 INFO L430 AbstractCegarLoop]: === Iteration 377 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:43,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1082730068, now seen corresponding path program 240 times [2021-06-05 05:22:43,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:43,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574259369] [2021-06-05 05:22:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:43,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574259369] [2021-06-05 05:22:43,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574259369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:43,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112128121] [2021-06-05 05:22:43,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:43,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:43,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:43,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:43,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:43,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:22:43,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:43,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:43,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:43,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:22:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:43,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112128121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:43,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:43,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:43,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950939439] [2021-06-05 05:22:43,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:43,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:43,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:43,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:43,850 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:44,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:44,609 INFO L93 Difference]: Finished difference Result 3812 states and 14469 transitions. [2021-06-05 05:22:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:22:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:44,616 INFO L225 Difference]: With dead ends: 3812 [2021-06-05 05:22:44,616 INFO L226 Difference]: Without dead ends: 3802 [2021-06-05 05:22:44,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 667.8ms TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:22:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2021-06-05 05:22:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3429. [2021-06-05 05:22:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.870770128354726) internal successors, (13269), 3428 states have internal predecessors, (13269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 13269 transitions. [2021-06-05 05:22:44,669 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 13269 transitions. Word has length 24 [2021-06-05 05:22:44,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:44,669 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 13269 transitions. [2021-06-05 05:22:44,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 13269 transitions. [2021-06-05 05:22:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:44,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:44,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:44,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-05 05:22:44,875 INFO L430 AbstractCegarLoop]: === Iteration 378 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash 644159276, now seen corresponding path program 241 times [2021-06-05 05:22:44,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:44,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697091353] [2021-06-05 05:22:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:45,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697091353] [2021-06-05 05:22:45,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697091353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740778853] [2021-06-05 05:22:45,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:45,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:22:45,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:45,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:45,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:45,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:22:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740778853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:45,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:45,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:22:45,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062117543] [2021-06-05 05:22:45,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:22:45,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:45,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:22:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:22:45,207 INFO L87 Difference]: Start difference. First operand 3429 states and 13269 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:45,844 INFO L93 Difference]: Finished difference Result 3817 states and 14487 transitions. [2021-06-05 05:22:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:22:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:45,851 INFO L225 Difference]: With dead ends: 3817 [2021-06-05 05:22:45,852 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 05:22:45,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:22:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 05:22:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3431. [2021-06-05 05:22:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 3.870262390670554) internal successors, (13275), 3430 states have internal predecessors, (13275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 13275 transitions. [2021-06-05 05:22:45,904 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 13275 transitions. Word has length 24 [2021-06-05 05:22:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:45,904 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 13275 transitions. [2021-06-05 05:22:45,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 13275 transitions. [2021-06-05 05:22:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:45,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:45,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:46,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:46,110 INFO L430 AbstractCegarLoop]: === Iteration 379 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1623573724, now seen corresponding path program 242 times [2021-06-05 05:22:46,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:46,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985331805] [2021-06-05 05:22:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:46,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:46,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985331805] [2021-06-05 05:22:46,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985331805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:46,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010567825] [2021-06-05 05:22:46,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:46,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:22:46,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:46,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:46,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:46,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:22:46,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:46,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:46,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:46,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:22:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:46,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010567825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:46,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:46,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:22:46,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207285525] [2021-06-05 05:22:46,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:46,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:46,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:46,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:46,521 INFO L87 Difference]: Start difference. First operand 3431 states and 13275 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:47,431 INFO L93 Difference]: Finished difference Result 3830 states and 14517 transitions. [2021-06-05 05:22:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:22:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:47,438 INFO L225 Difference]: With dead ends: 3830 [2021-06-05 05:22:47,438 INFO L226 Difference]: Without dead ends: 3819 [2021-06-05 05:22:47,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:22:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3819 states. [2021-06-05 05:22:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3819 to 3430. [2021-06-05 05:22:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 05:22:47,491 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 05:22:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:47,491 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 05:22:47,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:47,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 05:22:47,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:47,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:47,496 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:47,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 05:22:47,697 INFO L430 AbstractCegarLoop]: === Iteration 380 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1373271240, now seen corresponding path program 243 times [2021-06-05 05:22:47,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:47,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914447049] [2021-06-05 05:22:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:47,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:47,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914447049] [2021-06-05 05:22:47,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914447049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:47,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355138410] [2021-06-05 05:22:47,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:47,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:22:47,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:47,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:22:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:48,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:48,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:22:48,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:48,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:48,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:48,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:48,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:22:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:48,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355138410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:48,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:48,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:22:48,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109102735] [2021-06-05 05:22:48,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:22:48,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:22:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:22:48,109 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:51,722 INFO L93 Difference]: Finished difference Result 5894 states and 21603 transitions. [2021-06-05 05:22:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:22:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:51,732 INFO L225 Difference]: With dead ends: 5894 [2021-06-05 05:22:51,732 INFO L226 Difference]: Without dead ends: 5874 [2021-06-05 05:22:51,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 2963.5ms TimeCoverageRelationStatistics Valid=1122, Invalid=7434, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 05:22:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5874 states. [2021-06-05 05:22:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5874 to 3430. [2021-06-05 05:22:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 05:22:51,796 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 05:22:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:51,796 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 05:22:51,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 05:22:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:51,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:51,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:52,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:52,002 INFO L430 AbstractCegarLoop]: === Iteration 381 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:52,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1080747266, now seen corresponding path program 244 times [2021-06-05 05:22:52,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:52,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753400318] [2021-06-05 05:22:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:52,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:52,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753400318] [2021-06-05 05:22:52,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753400318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:52,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656048427] [2021-06-05 05:22:52,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:52,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:22:52,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:52,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:52,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:52,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:52,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:52,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:52,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:22:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:52,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656048427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:52,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:52,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:22:52,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126932046] [2021-06-05 05:22:52,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:52,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:52,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:52,381 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:55,217 INFO L93 Difference]: Finished difference Result 4990 states and 18316 transitions. [2021-06-05 05:22:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:22:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:55,226 INFO L225 Difference]: With dead ends: 4990 [2021-06-05 05:22:55,226 INFO L226 Difference]: Without dead ends: 4962 [2021-06-05 05:22:55,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 2147.8ms TimeCoverageRelationStatistics Valid=878, Invalid=5602, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:22:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-06-05 05:22:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3435. [2021-06-05 05:22:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.8698311007571347) internal successors, (13289), 3434 states have internal predecessors, (13289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13289 transitions. [2021-06-05 05:22:55,286 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13289 transitions. Word has length 24 [2021-06-05 05:22:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:55,286 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13289 transitions. [2021-06-05 05:22:55,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13289 transitions. [2021-06-05 05:22:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:55,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:55,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:55,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:55,492 INFO L430 AbstractCegarLoop]: === Iteration 382 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:55,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1071844342, now seen corresponding path program 245 times [2021-06-05 05:22:55,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:55,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061445552] [2021-06-05 05:22:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:55,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:55,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061445552] [2021-06-05 05:22:55,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061445552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:55,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137352791] [2021-06-05 05:22:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:55,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:22:55,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:55,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:22:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:55,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:22:55,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:22:55,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:55,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:55,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:22:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:55,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137352791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:55,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:55,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:22:55,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564127707] [2021-06-05 05:22:55,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:22:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:22:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:22:55,845 INFO L87 Difference]: Start difference. First operand 3435 states and 13289 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:22:58,220 INFO L93 Difference]: Finished difference Result 4925 states and 18087 transitions. [2021-06-05 05:22:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:22:58,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:22:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:22:58,229 INFO L225 Difference]: With dead ends: 4925 [2021-06-05 05:22:58,229 INFO L226 Difference]: Without dead ends: 4886 [2021-06-05 05:22:58,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1750.2ms TimeCoverageRelationStatistics Valid=607, Invalid=3683, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:22:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2021-06-05 05:22:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 3438. [2021-06-05 05:22:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.8687809135874307) internal successors, (13297), 3437 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13297 transitions. [2021-06-05 05:22:58,287 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13297 transitions. Word has length 24 [2021-06-05 05:22:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:22:58,287 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13297 transitions. [2021-06-05 05:22:58,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:22:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13297 transitions. [2021-06-05 05:22:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:22:58,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:22:58,292 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:22:58,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-06-05 05:22:58,497 INFO L430 AbstractCegarLoop]: === Iteration 383 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:22:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:22:58,497 INFO L82 PathProgramCache]: Analyzing trace with hash 864399170, now seen corresponding path program 246 times [2021-06-05 05:22:58,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:22:58,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520928684] [2021-06-05 05:22:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:22:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:22:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:58,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:22:58,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520928684] [2021-06-05 05:22:58,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520928684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:58,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986443931] [2021-06-05 05:22:58,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:22:58,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:22:58,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:22:58,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:22:58,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:22:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:58,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:22:58,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:58,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 05:22:58,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:22:58,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:22:58,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:22:58,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-05 05:22:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:22:58,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986443931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:22:58,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:22:58,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:22:58,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484220130] [2021-06-05 05:22:58,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:22:58,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:22:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:22:58,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:22:58,944 INFO L87 Difference]: Start difference. First operand 3438 states and 13297 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:00,937 INFO L93 Difference]: Finished difference Result 4581 states and 17132 transitions. [2021-06-05 05:23:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:23:00,937 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:00,945 INFO L225 Difference]: With dead ends: 4581 [2021-06-05 05:23:00,945 INFO L226 Difference]: Without dead ends: 4562 [2021-06-05 05:23:00,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1678.4ms TimeCoverageRelationStatistics Valid=567, Invalid=2973, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:23:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-06-05 05:23:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3434. [2021-06-05 05:23:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.870958345470434) internal successors, (13289), 3433 states have internal predecessors, (13289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 13289 transitions. [2021-06-05 05:23:00,997 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 13289 transitions. Word has length 24 [2021-06-05 05:23:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:00,997 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 13289 transitions. [2021-06-05 05:23:00,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 13289 transitions. [2021-06-05 05:23:01,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:01,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:01,002 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:01,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:01,203 INFO L430 AbstractCegarLoop]: === Iteration 384 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:01,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:01,207 INFO L82 PathProgramCache]: Analyzing trace with hash 687857738, now seen corresponding path program 247 times [2021-06-05 05:23:01,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:01,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800945553] [2021-06-05 05:23:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:01,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:01,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800945553] [2021-06-05 05:23:01,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800945553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:01,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115971970] [2021-06-05 05:23:01,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:01,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:23:01,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:01,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:01,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:01,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:23:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:01,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115971970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:01,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:01,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:23:01,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441104910] [2021-06-05 05:23:01,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:01,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:01,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:01,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:01,529 INFO L87 Difference]: Start difference. First operand 3434 states and 13289 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:02,524 INFO L93 Difference]: Finished difference Result 4592 states and 17139 transitions. [2021-06-05 05:23:02,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:23:02,524 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:02,532 INFO L225 Difference]: With dead ends: 4592 [2021-06-05 05:23:02,532 INFO L226 Difference]: Without dead ends: 4583 [2021-06-05 05:23:02,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 749.3ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:23:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-06-05 05:23:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3439. [2021-06-05 05:23:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3438 states have (on average 3.8694008144269922) internal successors, (13303), 3438 states have internal predecessors, (13303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 13303 transitions. [2021-06-05 05:23:02,586 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 13303 transitions. Word has length 24 [2021-06-05 05:23:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:02,586 INFO L482 AbstractCegarLoop]: Abstraction has 3439 states and 13303 transitions. [2021-06-05 05:23:02,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 13303 transitions. [2021-06-05 05:23:02,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:02,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:02,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:02,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 05:23:02,792 INFO L430 AbstractCegarLoop]: === Iteration 385 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:02,792 INFO L82 PathProgramCache]: Analyzing trace with hash -145880702, now seen corresponding path program 248 times [2021-06-05 05:23:02,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:02,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917338603] [2021-06-05 05:23:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:02,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:02,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917338603] [2021-06-05 05:23:02,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917338603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:02,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261963042] [2021-06-05 05:23:02,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:02,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:02,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:02,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:02,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:03,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:03,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:23:03,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:03,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:03,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:03,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:23:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:03,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261963042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:03,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:03,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:23:03,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029599631] [2021-06-05 05:23:03,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:03,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:03,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:03,191 INFO L87 Difference]: Start difference. First operand 3439 states and 13303 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:05,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:05,305 INFO L93 Difference]: Finished difference Result 4712 states and 17417 transitions. [2021-06-05 05:23:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:23:05,305 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:05,313 INFO L225 Difference]: With dead ends: 4712 [2021-06-05 05:23:05,313 INFO L226 Difference]: Without dead ends: 4702 [2021-06-05 05:23:05,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1823.9ms TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:23:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2021-06-05 05:23:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 3436. [2021-06-05 05:23:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 3.871033478893741) internal successors, (13297), 3435 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 13297 transitions. [2021-06-05 05:23:05,368 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 13297 transitions. Word has length 24 [2021-06-05 05:23:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:05,368 INFO L482 AbstractCegarLoop]: Abstraction has 3436 states and 13297 transitions. [2021-06-05 05:23:05,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 13297 transitions. [2021-06-05 05:23:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:05,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:05,373 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:05,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable743 [2021-06-05 05:23:05,574 INFO L430 AbstractCegarLoop]: === Iteration 386 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:05,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:05,574 INFO L82 PathProgramCache]: Analyzing trace with hash 635953098, now seen corresponding path program 249 times [2021-06-05 05:23:05,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:05,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344310282] [2021-06-05 05:23:05,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:05,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:05,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344310282] [2021-06-05 05:23:05,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344310282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:05,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963218715] [2021-06-05 05:23:05,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:05,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:23:05,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:05,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:05,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:05,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:05,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:05,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:23:05,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:05,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:05,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:05,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 05:23:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:05,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963218715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:05,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:05,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:23:05,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699547165] [2021-06-05 05:23:05,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:05,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:05,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:05,938 INFO L87 Difference]: Start difference. First operand 3436 states and 13297 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:07,367 INFO L93 Difference]: Finished difference Result 4517 states and 16899 transitions. [2021-06-05 05:23:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:23:07,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:07,376 INFO L225 Difference]: With dead ends: 4517 [2021-06-05 05:23:07,376 INFO L226 Difference]: Without dead ends: 4507 [2021-06-05 05:23:07,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1160.5ms TimeCoverageRelationStatistics Valid=390, Invalid=2160, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:23:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-06-05 05:23:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3430. [2021-06-05 05:23:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 05:23:07,432 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 05:23:07,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:07,432 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 05:23:07,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 05:23:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:07,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:07,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:07,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable746,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:07,638 INFO L430 AbstractCegarLoop]: === Iteration 387 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -305635602, now seen corresponding path program 21 times [2021-06-05 05:23:07,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:07,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607893663] [2021-06-05 05:23:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:07,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:07,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607893663] [2021-06-05 05:23:07,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607893663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:07,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960272483] [2021-06-05 05:23:07,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:07,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:23:07,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:07,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:07,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:07,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:07,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:23:07,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:23:07,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:08,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:08,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:08,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:23:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:08,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960272483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:08,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:08,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:23:08,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468268195] [2021-06-05 05:23:08,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:23:08,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:08,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:23:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:23:08,029 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:11,455 INFO L93 Difference]: Finished difference Result 5710 states and 20952 transitions. [2021-06-05 05:23:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:23:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:11,465 INFO L225 Difference]: With dead ends: 5710 [2021-06-05 05:23:11,465 INFO L226 Difference]: Without dead ends: 5688 [2021-06-05 05:23:11,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 2903.7ms TimeCoverageRelationStatistics Valid=1127, Invalid=7615, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 05:23:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2021-06-05 05:23:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 3430. [2021-06-05 05:23:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 05:23:11,528 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 05:23:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:11,528 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 05:23:11,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 05:23:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:11,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:11,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:11,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-06-05 05:23:11,734 INFO L430 AbstractCegarLoop]: === Iteration 388 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:11,734 INFO L82 PathProgramCache]: Analyzing trace with hash -815151466, now seen corresponding path program 22 times [2021-06-05 05:23:11,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:11,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308292767] [2021-06-05 05:23:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:11,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:11,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308292767] [2021-06-05 05:23:11,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308292767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:11,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120235536] [2021-06-05 05:23:11,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:11,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:11,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:11,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:12,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:23:12,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:12,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:12,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:12,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:23:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:12,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120235536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:12,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:12,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:23:12,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581632457] [2021-06-05 05:23:12,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:12,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:12,067 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:15,218 INFO L93 Difference]: Finished difference Result 4808 states and 17690 transitions. [2021-06-05 05:23:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:23:15,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:15,226 INFO L225 Difference]: With dead ends: 4808 [2021-06-05 05:23:15,227 INFO L226 Difference]: Without dead ends: 4779 [2021-06-05 05:23:15,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 2133.4ms TimeCoverageRelationStatistics Valid=878, Invalid=5602, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:23:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4779 states. [2021-06-05 05:23:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4779 to 3437. [2021-06-05 05:23:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3436 states have (on average 3.869906868451688) internal successors, (13297), 3436 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13297 transitions. [2021-06-05 05:23:15,282 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13297 transitions. Word has length 24 [2021-06-05 05:23:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:15,282 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13297 transitions. [2021-06-05 05:23:15,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13297 transitions. [2021-06-05 05:23:15,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:15,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:15,287 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:15,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:15,488 INFO L430 AbstractCegarLoop]: === Iteration 389 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:15,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:15,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1024688846, now seen corresponding path program 23 times [2021-06-05 05:23:15,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:15,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817820855] [2021-06-05 05:23:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:15,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:15,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817820855] [2021-06-05 05:23:15,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817820855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:15,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134732727] [2021-06-05 05:23:15,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:15,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:23:15,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:15,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:15,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:23:15,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:15,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:15,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:15,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:23:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:15,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134732727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:15,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:15,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:23:15,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609665618] [2021-06-05 05:23:15,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:15,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:15,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:15,839 INFO L87 Difference]: Start difference. First operand 3437 states and 13297 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:18,137 INFO L93 Difference]: Finished difference Result 4743 states and 17460 transitions. [2021-06-05 05:23:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:23:18,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:18,145 INFO L225 Difference]: With dead ends: 4743 [2021-06-05 05:23:18,145 INFO L226 Difference]: Without dead ends: 4703 [2021-06-05 05:23:18,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1732.3ms TimeCoverageRelationStatistics Valid=607, Invalid=3683, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:23:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2021-06-05 05:23:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 3440. [2021-06-05 05:23:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 3.869438790346031) internal successors, (13307), 3439 states have internal predecessors, (13307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 13307 transitions. [2021-06-05 05:23:18,201 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 13307 transitions. Word has length 24 [2021-06-05 05:23:18,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:18,201 INFO L482 AbstractCegarLoop]: Abstraction has 3440 states and 13307 transitions. [2021-06-05 05:23:18,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:18,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 13307 transitions. [2021-06-05 05:23:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:18,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:18,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:18,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:18,406 INFO L430 AbstractCegarLoop]: === Iteration 390 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash 703982900, now seen corresponding path program 24 times [2021-06-05 05:23:18,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:18,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129389163] [2021-06-05 05:23:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:18,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:18,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129389163] [2021-06-05 05:23:18,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129389163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:18,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209605861] [2021-06-05 05:23:18,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:18,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:23:18,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:23:18,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:18,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:18,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:18,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 05:23:18,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:23:18,808 INFO L628 ElimStorePlain]: treesize reduction 27, result has 47.1 percent of original size [2021-06-05 05:23:18,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:18,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-05 05:23:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:18,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209605861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:18,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:18,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:23:18,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861580625] [2021-06-05 05:23:18,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:18,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:18,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:18,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:18,870 INFO L87 Difference]: Start difference. First operand 3440 states and 13307 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:20,327 INFO L93 Difference]: Finished difference Result 4481 states and 16783 transitions. [2021-06-05 05:23:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:23:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:20,336 INFO L225 Difference]: With dead ends: 4481 [2021-06-05 05:23:20,336 INFO L226 Difference]: Without dead ends: 4462 [2021-06-05 05:23:20,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1274.7ms TimeCoverageRelationStatistics Valid=403, Invalid=2353, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:23:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-06-05 05:23:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 3435. [2021-06-05 05:23:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.870995923121724) internal successors, (13293), 3434 states have internal predecessors, (13293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13293 transitions. [2021-06-05 05:23:20,402 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13293 transitions. Word has length 24 [2021-06-05 05:23:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:20,402 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13293 transitions. [2021-06-05 05:23:20,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13293 transitions. [2021-06-05 05:23:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:20,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:20,407 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:20,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:20,608 INFO L430 AbstractCegarLoop]: === Iteration 391 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:20,608 INFO L82 PathProgramCache]: Analyzing trace with hash -324166960, now seen corresponding path program 25 times [2021-06-05 05:23:20,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:20,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388365550] [2021-06-05 05:23:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:20,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:20,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388365550] [2021-06-05 05:23:20,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388365550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:20,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560161306] [2021-06-05 05:23:20,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:20,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:20,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:23:20,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:20,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:20,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:20,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:23:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560161306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:20,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:20,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:23:20,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143068949] [2021-06-05 05:23:20,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:20,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:20,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:20,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:20,912 INFO L87 Difference]: Start difference. First operand 3435 states and 13293 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:21,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:21,906 INFO L93 Difference]: Finished difference Result 4403 states and 16490 transitions. [2021-06-05 05:23:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:23:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:21,913 INFO L225 Difference]: With dead ends: 4403 [2021-06-05 05:23:21,913 INFO L226 Difference]: Without dead ends: 4394 [2021-06-05 05:23:21,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 740.0ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:23:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-06-05 05:23:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 3444. [2021-06-05 05:23:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3443 states have (on average 3.869009584664537) internal successors, (13321), 3443 states have internal predecessors, (13321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 13321 transitions. [2021-06-05 05:23:21,964 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 13321 transitions. Word has length 24 [2021-06-05 05:23:21,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:21,965 INFO L482 AbstractCegarLoop]: Abstraction has 3444 states and 13321 transitions. [2021-06-05 05:23:21,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 13321 transitions. [2021-06-05 05:23:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:21,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:21,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:22,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:22,170 INFO L430 AbstractCegarLoop]: === Iteration 392 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:22,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:22,170 INFO L82 PathProgramCache]: Analyzing trace with hash -580782, now seen corresponding path program 26 times [2021-06-05 05:23:22,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:22,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468361125] [2021-06-05 05:23:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:22,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:22,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468361125] [2021-06-05 05:23:22,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468361125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:22,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259345972] [2021-06-05 05:23:22,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:22,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:22,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:22,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:22,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:22,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:22,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:23:22,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:22,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:22,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:22,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:23:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:22,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259345972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:22,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:22,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:23:22,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528754065] [2021-06-05 05:23:22,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:22,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:22,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:22,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:22,537 INFO L87 Difference]: Start difference. First operand 3444 states and 13321 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:24,737 INFO L93 Difference]: Finished difference Result 4536 states and 16812 transitions. [2021-06-05 05:23:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:23:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:24,745 INFO L225 Difference]: With dead ends: 4536 [2021-06-05 05:23:24,745 INFO L226 Difference]: Without dead ends: 4525 [2021-06-05 05:23:24,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1774.4ms TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:23:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2021-06-05 05:23:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 3446. [2021-06-05 05:23:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 3.8685050798258347) internal successors, (13327), 3445 states have internal predecessors, (13327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 13327 transitions. [2021-06-05 05:23:24,809 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 13327 transitions. Word has length 24 [2021-06-05 05:23:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:24,809 INFO L482 AbstractCegarLoop]: Abstraction has 3446 states and 13327 transitions. [2021-06-05 05:23:24,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 13327 transitions. [2021-06-05 05:23:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:24,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:24,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:25,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 05:23:25,015 INFO L430 AbstractCegarLoop]: === Iteration 393 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:25,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1685163340, now seen corresponding path program 27 times [2021-06-05 05:23:25,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:25,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543797708] [2021-06-05 05:23:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:25,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:25,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543797708] [2021-06-05 05:23:25,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543797708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:25,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622105847] [2021-06-05 05:23:25,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:25,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:23:25,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:25,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:25,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:25,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:25,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:23:25,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:25,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:25,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:25,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:23:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:25,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622105847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:25,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:25,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:23:25,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367746787] [2021-06-05 05:23:25,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:25,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:25,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:25,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:25,384 INFO L87 Difference]: Start difference. First operand 3446 states and 13327 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:27,117 INFO L93 Difference]: Finished difference Result 4381 states and 16352 transitions. [2021-06-05 05:23:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:23:27,117 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:27,124 INFO L225 Difference]: With dead ends: 4381 [2021-06-05 05:23:27,125 INFO L226 Difference]: Without dead ends: 4370 [2021-06-05 05:23:27,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1499.8ms TimeCoverageRelationStatistics Valid=503, Invalid=2689, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:23:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-06-05 05:23:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3430. [2021-06-05 05:23:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 05:23:27,179 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 05:23:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:27,179 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 05:23:27,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 05:23:27,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:27,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:27,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:27,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:27,385 INFO L430 AbstractCegarLoop]: === Iteration 394 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:27,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1006805604, now seen corresponding path program 250 times [2021-06-05 05:23:27,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:27,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544512429] [2021-06-05 05:23:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:27,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:27,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544512429] [2021-06-05 05:23:27,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544512429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:27,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108708214] [2021-06-05 05:23:27,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:27,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:27,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:27,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:27,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:27,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:23:27,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:27,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:27,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:27,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:23:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:27,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108708214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:27,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:27,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:23:27,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347841316] [2021-06-05 05:23:27,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:27,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:27,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:27,760 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:29,566 INFO L93 Difference]: Finished difference Result 4524 states and 16773 transitions. [2021-06-05 05:23:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:23:29,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:29,574 INFO L225 Difference]: With dead ends: 4524 [2021-06-05 05:23:29,574 INFO L226 Difference]: Without dead ends: 4506 [2021-06-05 05:23:29,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1275.9ms TimeCoverageRelationStatistics Valid=527, Invalid=3379, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:23:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-05 05:23:29,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 3431. [2021-06-05 05:23:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 3.8705539358600585) internal successors, (13276), 3430 states have internal predecessors, (13276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 13276 transitions. [2021-06-05 05:23:29,626 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 13276 transitions. Word has length 24 [2021-06-05 05:23:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:29,626 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 13276 transitions. [2021-06-05 05:23:29,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 13276 transitions. [2021-06-05 05:23:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:29,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:29,631 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:29,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-05 05:23:29,832 INFO L430 AbstractCegarLoop]: === Iteration 395 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:29,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1780079634, now seen corresponding path program 251 times [2021-06-05 05:23:29,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:29,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728980927] [2021-06-05 05:23:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:29,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728980927] [2021-06-05 05:23:29,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728980927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535463012] [2021-06-05 05:23:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:30,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:23:30,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:30,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:30,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:30,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:23:30,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:30,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:30,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:30,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:23:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:30,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535463012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:30,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:30,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:23:30,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82020666] [2021-06-05 05:23:30,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:30,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:30,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:30,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:30,175 INFO L87 Difference]: Start difference. First operand 3431 states and 13276 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:32,289 INFO L93 Difference]: Finished difference Result 4585 states and 16896 transitions. [2021-06-05 05:23:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:23:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:32,310 INFO L225 Difference]: With dead ends: 4585 [2021-06-05 05:23:32,310 INFO L226 Difference]: Without dead ends: 4550 [2021-06-05 05:23:32,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1478.5ms TimeCoverageRelationStatistics Valid=512, Invalid=3394, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:23:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4550 states. [2021-06-05 05:23:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4550 to 3435. [2021-06-05 05:23:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.869539895165987) internal successors, (13288), 3434 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13288 transitions. [2021-06-05 05:23:32,359 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13288 transitions. Word has length 24 [2021-06-05 05:23:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:32,359 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13288 transitions. [2021-06-05 05:23:32,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13288 transitions. [2021-06-05 05:23:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:32,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:32,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:32,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 05:23:32,565 INFO L430 AbstractCegarLoop]: === Iteration 396 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash -578644150, now seen corresponding path program 252 times [2021-06-05 05:23:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670353191] [2021-06-05 05:23:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:32,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:32,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670353191] [2021-06-05 05:23:32,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670353191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:32,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176282659] [2021-06-05 05:23:32,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:32,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:23:32,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:32,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:32,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:32,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:32,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 05:23:32,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:23:32,952 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-05 05:23:32,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:32,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 05:23:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:33,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176282659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:33,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:33,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:23:33,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594168835] [2021-06-05 05:23:33,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:33,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:33,012 INFO L87 Difference]: Start difference. First operand 3435 states and 13288 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:35,075 INFO L93 Difference]: Finished difference Result 4544 states and 16857 transitions. [2021-06-05 05:23:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:23:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:35,084 INFO L225 Difference]: With dead ends: 4544 [2021-06-05 05:23:35,084 INFO L226 Difference]: Without dead ends: 4518 [2021-06-05 05:23:35,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1690.8ms TimeCoverageRelationStatistics Valid=580, Invalid=3976, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:23:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-06-05 05:23:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3435. [2021-06-05 05:23:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.8707047175305767) internal successors, (13292), 3434 states have internal predecessors, (13292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13292 transitions. [2021-06-05 05:23:35,140 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13292 transitions. Word has length 24 [2021-06-05 05:23:35,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:35,140 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13292 transitions. [2021-06-05 05:23:35,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13292 transitions. [2021-06-05 05:23:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:35,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:35,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:35,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable762,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:35,348 INFO L430 AbstractCegarLoop]: === Iteration 397 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash -755185582, now seen corresponding path program 253 times [2021-06-05 05:23:35,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:35,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826249788] [2021-06-05 05:23:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:35,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:35,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826249788] [2021-06-05 05:23:35,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826249788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:35,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108636191] [2021-06-05 05:23:35,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:35,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:35,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:23:35,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:35,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:35,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:35,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:23:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:35,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108636191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:35,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:35,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:23:35,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933420642] [2021-06-05 05:23:35,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:35,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:35,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:35,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:35,698 INFO L87 Difference]: Start difference. First operand 3435 states and 13292 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:36,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:36,829 INFO L93 Difference]: Finished difference Result 4319 states and 16194 transitions. [2021-06-05 05:23:36,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:23:36,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:36,836 INFO L225 Difference]: With dead ends: 4319 [2021-06-05 05:23:36,836 INFO L226 Difference]: Without dead ends: 4310 [2021-06-05 05:23:36,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 909.0ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:23:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2021-06-05 05:23:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 3437. [2021-06-05 05:23:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3436 states have (on average 3.870197904540163) internal successors, (13298), 3436 states have internal predecessors, (13298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13298 transitions. [2021-06-05 05:23:36,887 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13298 transitions. Word has length 24 [2021-06-05 05:23:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:36,887 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13298 transitions. [2021-06-05 05:23:36,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13298 transitions. [2021-06-05 05:23:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:36,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:36,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:37,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-05 05:23:37,092 INFO L430 AbstractCegarLoop]: === Iteration 398 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:37,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1588924022, now seen corresponding path program 254 times [2021-06-05 05:23:37,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:37,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631551195] [2021-06-05 05:23:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:37,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:37,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631551195] [2021-06-05 05:23:37,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631551195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:37,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368761643] [2021-06-05 05:23:37,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:37,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:37,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:37,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:37,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:37,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:37,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:23:37,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:37,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:37,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:37,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:23:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:37,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368761643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:37,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:37,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:23:37,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775168112] [2021-06-05 05:23:37,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:37,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:37,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:37,478 INFO L87 Difference]: Start difference. First operand 3437 states and 13298 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:39,346 INFO L93 Difference]: Finished difference Result 4391 states and 16320 transitions. [2021-06-05 05:23:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:23:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:39,354 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 05:23:39,354 INFO L226 Difference]: Without dead ends: 4381 [2021-06-05 05:23:39,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1519.8ms TimeCoverageRelationStatistics Valid=556, Invalid=2866, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:23:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2021-06-05 05:23:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 3437. [2021-06-05 05:23:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3436 states have (on average 3.871071012805588) internal successors, (13301), 3436 states have internal predecessors, (13301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13301 transitions. [2021-06-05 05:23:39,408 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13301 transitions. Word has length 24 [2021-06-05 05:23:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:39,408 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13301 transitions. [2021-06-05 05:23:39,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13301 transitions. [2021-06-05 05:23:39,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:39,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:39,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:39,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:39,613 INFO L430 AbstractCegarLoop]: === Iteration 399 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:39,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:39,614 INFO L82 PathProgramCache]: Analyzing trace with hash -807090222, now seen corresponding path program 255 times [2021-06-05 05:23:39,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:39,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016497091] [2021-06-05 05:23:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:39,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016497091] [2021-06-05 05:23:39,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016497091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351624789] [2021-06-05 05:23:39,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:39,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:23:39,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:39,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:39,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:39,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:39,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:23:39,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:39,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:39,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:39,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:23:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:39,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351624789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:39,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:39,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:23:39,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170521349] [2021-06-05 05:23:39,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:39,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:39,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:39,991 INFO L87 Difference]: Start difference. First operand 3437 states and 13301 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:41,378 INFO L93 Difference]: Finished difference Result 4263 states and 15959 transitions. [2021-06-05 05:23:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:23:41,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:41,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:41,385 INFO L225 Difference]: With dead ends: 4263 [2021-06-05 05:23:41,386 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 05:23:41,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1120.4ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:23:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 05:23:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3432. [2021-06-05 05:23:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3431 states have (on average 3.8705916642378315) internal successors, (13280), 3431 states have internal predecessors, (13280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 13280 transitions. [2021-06-05 05:23:41,436 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 13280 transitions. Word has length 24 [2021-06-05 05:23:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:41,436 INFO L482 AbstractCegarLoop]: Abstraction has 3432 states and 13280 transitions. [2021-06-05 05:23:41,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 13280 transitions. [2021-06-05 05:23:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:41,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:41,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:41,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:41,641 INFO L430 AbstractCegarLoop]: === Iteration 400 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1937128230, now seen corresponding path program 28 times [2021-06-05 05:23:41,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:41,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210972705] [2021-06-05 05:23:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:41,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:41,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210972705] [2021-06-05 05:23:41,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210972705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:41,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346978997] [2021-06-05 05:23:41,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:41,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:41,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:41,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:23:41,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:41,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:41,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:41,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:23:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:41,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346978997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:41,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:41,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:23:41,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455580728] [2021-06-05 05:23:41,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:41,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:41,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:41,977 INFO L87 Difference]: Start difference. First operand 3432 states and 13280 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:43,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:43,835 INFO L93 Difference]: Finished difference Result 4541 states and 16821 transitions. [2021-06-05 05:23:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:23:43,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:43,843 INFO L225 Difference]: With dead ends: 4541 [2021-06-05 05:23:43,843 INFO L226 Difference]: Without dead ends: 4523 [2021-06-05 05:23:43,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1259.6ms TimeCoverageRelationStatistics Valid=527, Invalid=3379, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:23:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2021-06-05 05:23:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 3432. [2021-06-05 05:23:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3431 states have (on average 3.8705916642378315) internal successors, (13280), 3431 states have internal predecessors, (13280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 13280 transitions. [2021-06-05 05:23:43,897 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 13280 transitions. Word has length 24 [2021-06-05 05:23:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:43,897 INFO L482 AbstractCegarLoop]: Abstraction has 3432 states and 13280 transitions. [2021-06-05 05:23:43,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 13280 transitions. [2021-06-05 05:23:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:43,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:43,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:44,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-05 05:23:44,103 INFO L430 AbstractCegarLoop]: === Iteration 401 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:44,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1727590850, now seen corresponding path program 29 times [2021-06-05 05:23:44,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:44,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449021205] [2021-06-05 05:23:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:44,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:44,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449021205] [2021-06-05 05:23:44,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449021205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:44,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414028507] [2021-06-05 05:23:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:44,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:23:44,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:44,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:44,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:44,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:23:44,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:44,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:44,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:44,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:23:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:44,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414028507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:44,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:44,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:23:44,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684847623] [2021-06-05 05:23:44,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:44,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:44,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:44,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:44,470 INFO L87 Difference]: Start difference. First operand 3432 states and 13280 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:46,540 INFO L93 Difference]: Finished difference Result 4597 states and 16922 transitions. [2021-06-05 05:23:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:23:46,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:46,548 INFO L225 Difference]: With dead ends: 4597 [2021-06-05 05:23:46,549 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 05:23:46,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1455.4ms TimeCoverageRelationStatistics Valid=512, Invalid=3394, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:23:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 05:23:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3436. [2021-06-05 05:23:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 3.870160116448326) internal successors, (13294), 3435 states have internal predecessors, (13294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 13294 transitions. [2021-06-05 05:23:46,610 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 13294 transitions. Word has length 24 [2021-06-05 05:23:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:46,610 INFO L482 AbstractCegarLoop]: Abstraction has 3436 states and 13294 transitions. [2021-06-05 05:23:46,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 13294 transitions. [2021-06-05 05:23:46,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:46,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:46,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:46,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 05:23:46,816 INFO L430 AbstractCegarLoop]: === Iteration 402 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:46,816 INFO L82 PathProgramCache]: Analyzing trace with hash -838704700, now seen corresponding path program 30 times [2021-06-05 05:23:46,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:46,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715932655] [2021-06-05 05:23:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:46,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715932655] [2021-06-05 05:23:46,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715932655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229530389] [2021-06-05 05:23:46,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:47,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:23:47,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:47,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:23:47,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:47,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:23:47,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:47,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 05:23:47,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:47,240 INFO L628 ElimStorePlain]: treesize reduction 35, result has 50.0 percent of original size [2021-06-05 05:23:47,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:47,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:39 [2021-06-05 05:23:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:47,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229530389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:47,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:47,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:23:47,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973561019] [2021-06-05 05:23:47,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:23:47,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:23:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:23:47,323 INFO L87 Difference]: Start difference. First operand 3436 states and 13294 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:49,104 INFO L93 Difference]: Finished difference Result 4452 states and 16642 transitions. [2021-06-05 05:23:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:23:49,104 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:49,113 INFO L225 Difference]: With dead ends: 4452 [2021-06-05 05:23:49,113 INFO L226 Difference]: Without dead ends: 4433 [2021-06-05 05:23:49,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1362.2ms TimeCoverageRelationStatistics Valid=466, Invalid=3194, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:23:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2021-06-05 05:23:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 3447. [2021-06-05 05:23:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 3.8691236215902496) internal successors, (13333), 3446 states have internal predecessors, (13333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 13333 transitions. [2021-06-05 05:23:49,181 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 13333 transitions. Word has length 24 [2021-06-05 05:23:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:49,181 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 13333 transitions. [2021-06-05 05:23:49,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 13333 transitions. [2021-06-05 05:23:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:49,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:49,187 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:49,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:49,388 INFO L430 AbstractCegarLoop]: === Iteration 403 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:49,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1866854560, now seen corresponding path program 31 times [2021-06-05 05:23:49,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:49,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385736712] [2021-06-05 05:23:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:49,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385736712] [2021-06-05 05:23:49,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385736712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240613523] [2021-06-05 05:23:49,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:49,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:49,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:23:49,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:49,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:49,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:49,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:23:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:49,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240613523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:49,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:49,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:23:49,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776986524] [2021-06-05 05:23:49,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:49,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:49,715 INFO L87 Difference]: Start difference. First operand 3447 states and 13333 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:50,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:50,805 INFO L93 Difference]: Finished difference Result 4341 states and 16273 transitions. [2021-06-05 05:23:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:23:50,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:50,812 INFO L225 Difference]: With dead ends: 4341 [2021-06-05 05:23:50,812 INFO L226 Difference]: Without dead ends: 4332 [2021-06-05 05:23:50,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 872.5ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:23:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-06-05 05:23:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3452. [2021-06-05 05:23:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.86815415821501) internal successors, (13349), 3451 states have internal predecessors, (13349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 13349 transitions. [2021-06-05 05:23:50,864 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 13349 transitions. Word has length 24 [2021-06-05 05:23:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:50,865 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 13349 transitions. [2021-06-05 05:23:50,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 13349 transitions. [2021-06-05 05:23:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:50,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:50,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:51,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:51,070 INFO L430 AbstractCegarLoop]: === Iteration 404 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1543268382, now seen corresponding path program 32 times [2021-06-05 05:23:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:51,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396423179] [2021-06-05 05:23:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:51,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:51,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396423179] [2021-06-05 05:23:51,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396423179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:51,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79423377] [2021-06-05 05:23:51,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:51,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:51,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:51,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:51,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:51,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:23:51,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:51,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:51,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:51,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:23:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:51,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79423377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:51,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:51,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:23:51,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584253095] [2021-06-05 05:23:51,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:23:51,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:51,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:23:51,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:23:51,448 INFO L87 Difference]: Start difference. First operand 3452 states and 13349 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:53,346 INFO L93 Difference]: Finished difference Result 4422 states and 16432 transitions. [2021-06-05 05:23:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:23:53,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:53,354 INFO L225 Difference]: With dead ends: 4422 [2021-06-05 05:23:53,354 INFO L226 Difference]: Without dead ends: 4411 [2021-06-05 05:23:53,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1529.6ms TimeCoverageRelationStatistics Valid=556, Invalid=2866, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:23:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-05 05:23:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3455. [2021-06-05 05:23:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 3.8679791546033586) internal successors, (13360), 3454 states have internal predecessors, (13360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 13360 transitions. [2021-06-05 05:23:53,409 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 13360 transitions. Word has length 24 [2021-06-05 05:23:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:53,409 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 13360 transitions. [2021-06-05 05:23:53,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 13360 transitions. [2021-06-05 05:23:53,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:53,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:53,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:53,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:53,621 INFO L430 AbstractCegarLoop]: === Iteration 405 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash 142475740, now seen corresponding path program 33 times [2021-06-05 05:23:53,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:53,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100298504] [2021-06-05 05:23:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:53,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100298504] [2021-06-05 05:23:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100298504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711452561] [2021-06-05 05:23:53,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:53,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:23:53,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:53,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:53,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:53,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:53,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:23:53,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:53,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:53,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:53,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:23:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:54,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711452561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:54,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:54,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 05:23:54,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909500099] [2021-06-05 05:23:54,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:23:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:23:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:23:54,013 INFO L87 Difference]: Start difference. First operand 3455 states and 13360 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:55,558 INFO L93 Difference]: Finished difference Result 4282 states and 16027 transitions. [2021-06-05 05:23:55,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:23:55,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:55,566 INFO L225 Difference]: With dead ends: 4282 [2021-06-05 05:23:55,566 INFO L226 Difference]: Without dead ends: 4271 [2021-06-05 05:23:55,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1211.9ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:23:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2021-06-05 05:23:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 3444. [2021-06-05 05:23:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3443 states have (on average 3.869009584664537) internal successors, (13321), 3443 states have internal predecessors, (13321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 13321 transitions. [2021-06-05 05:23:55,618 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 13321 transitions. Word has length 24 [2021-06-05 05:23:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:55,618 INFO L482 AbstractCegarLoop]: Abstraction has 3444 states and 13321 transitions. [2021-06-05 05:23:55,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 13321 transitions. [2021-06-05 05:23:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:55,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:55,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:55,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 05:23:55,824 INFO L430 AbstractCegarLoop]: === Iteration 406 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:55,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1345253192, now seen corresponding path program 256 times [2021-06-05 05:23:55,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:55,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110505002] [2021-06-05 05:23:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:55,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:55,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110505002] [2021-06-05 05:23:55,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110505002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:55,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993604491] [2021-06-05 05:23:55,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:55,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:23:55,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:55,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:56,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:23:56,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:56,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:56,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:56,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:23:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:56,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993604491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:56,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:56,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 05:23:56,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888062469] [2021-06-05 05:23:56,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:56,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:56,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:56,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:56,126 INFO L87 Difference]: Start difference. First operand 3444 states and 13321 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:57,100 INFO L93 Difference]: Finished difference Result 3732 states and 14071 transitions. [2021-06-05 05:23:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:23:57,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:57,107 INFO L225 Difference]: With dead ends: 3732 [2021-06-05 05:23:57,107 INFO L226 Difference]: Without dead ends: 3648 [2021-06-05 05:23:57,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 638.3ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:23:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-06-05 05:23:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3449. [2021-06-05 05:23:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 3.867169373549884) internal successors, (13334), 3448 states have internal predecessors, (13334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 13334 transitions. [2021-06-05 05:23:57,158 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 13334 transitions. Word has length 24 [2021-06-05 05:23:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:57,158 INFO L482 AbstractCegarLoop]: Abstraction has 3449 states and 13334 transitions. [2021-06-05 05:23:57,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 13334 transitions. [2021-06-05 05:23:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:57,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:57,163 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:57,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:57,364 INFO L430 AbstractCegarLoop]: === Iteration 407 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:57,364 INFO L82 PathProgramCache]: Analyzing trace with hash -80955710, now seen corresponding path program 257 times [2021-06-05 05:23:57,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:57,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342032102] [2021-06-05 05:23:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:57,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:57,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342032102] [2021-06-05 05:23:57,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342032102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:57,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098774923] [2021-06-05 05:23:57,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:57,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:23:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:57,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:23:57,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:57,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:23:57,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:57,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:57,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:57,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:23:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:57,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098774923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:57,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:57,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 05:23:57,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266041638] [2021-06-05 05:23:57,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:23:57,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:57,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:23:57,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:23:57,684 INFO L87 Difference]: Start difference. First operand 3449 states and 13334 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:23:58,697 INFO L93 Difference]: Finished difference Result 3731 states and 14034 transitions. [2021-06-05 05:23:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:23:58,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:23:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:23:58,704 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 05:23:58,704 INFO L226 Difference]: Without dead ends: 3654 [2021-06-05 05:23:58,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:23:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2021-06-05 05:23:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 3452. [2021-06-05 05:23:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.8658359895682413) internal successors, (13341), 3451 states have internal predecessors, (13341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 13341 transitions. [2021-06-05 05:23:58,752 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 13341 transitions. Word has length 24 [2021-06-05 05:23:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:23:58,752 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 13341 transitions. [2021-06-05 05:23:58,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:23:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 13341 transitions. [2021-06-05 05:23:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:23:58,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:23:58,757 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:23:58,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:58,957 INFO L430 AbstractCegarLoop]: === Iteration 408 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:23:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:23:58,958 INFO L82 PathProgramCache]: Analyzing trace with hash -257497142, now seen corresponding path program 258 times [2021-06-05 05:23:58,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:23:58,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084442914] [2021-06-05 05:23:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:23:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:23:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:59,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:23:59,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084442914] [2021-06-05 05:23:59,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084442914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:59,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094446043] [2021-06-05 05:23:59,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:23:59,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:23:59,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:23:59,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:23:59,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:23:59,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:59,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:23:59,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:23:59,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:23:59,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:23:59,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 05:23:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:23:59,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094446043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:23:59,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:23:59,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:23:59,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729083367] [2021-06-05 05:23:59,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:23:59,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:23:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:23:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:23:59,349 INFO L87 Difference]: Start difference. First operand 3452 states and 13341 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:00,355 INFO L93 Difference]: Finished difference Result 3630 states and 13842 transitions. [2021-06-05 05:24:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:24:00,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:00,362 INFO L225 Difference]: With dead ends: 3630 [2021-06-05 05:24:00,362 INFO L226 Difference]: Without dead ends: 3585 [2021-06-05 05:24:00,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 769.4ms TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:24:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-06-05 05:24:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3452. [2021-06-05 05:24:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.8658359895682413) internal successors, (13341), 3451 states have internal predecessors, (13341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 13341 transitions. [2021-06-05 05:24:00,409 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 13341 transitions. Word has length 24 [2021-06-05 05:24:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:00,409 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 13341 transitions. [2021-06-05 05:24:00,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 13341 transitions. [2021-06-05 05:24:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:00,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:00,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:00,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-06-05 05:24:00,614 INFO L430 AbstractCegarLoop]: === Iteration 409 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:00,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:00,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1091235582, now seen corresponding path program 259 times [2021-06-05 05:24:00,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:00,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946267219] [2021-06-05 05:24:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:00,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:00,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946267219] [2021-06-05 05:24:00,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946267219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:00,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198360610] [2021-06-05 05:24:00,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:00,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:00,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:00,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 05:24:00,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:00,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:00,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:00,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 05:24:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:00,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198360610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:00,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:00,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 05:24:00,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600979316] [2021-06-05 05:24:00,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:24:00,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:00,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:24:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:00,905 INFO L87 Difference]: Start difference. First operand 3452 states and 13341 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:01,496 INFO L93 Difference]: Finished difference Result 3580 states and 13695 transitions. [2021-06-05 05:24:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:24:01,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:01,503 INFO L225 Difference]: With dead ends: 3580 [2021-06-05 05:24:01,503 INFO L226 Difference]: Without dead ends: 3541 [2021-06-05 05:24:01,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:24:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-06-05 05:24:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3450. [2021-06-05 05:24:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 3449 states have (on average 3.8669179472310815) internal successors, (13337), 3449 states have internal predecessors, (13337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 13337 transitions. [2021-06-05 05:24:01,550 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 13337 transitions. Word has length 24 [2021-06-05 05:24:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:01,550 INFO L482 AbstractCegarLoop]: Abstraction has 3450 states and 13337 transitions. [2021-06-05 05:24:01,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:01,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 13337 transitions. [2021-06-05 05:24:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:01,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:01,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:01,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:01,756 INFO L430 AbstractCegarLoop]: === Iteration 410 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:01,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1382111726, now seen corresponding path program 34 times [2021-06-05 05:24:01,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:01,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863893654] [2021-06-05 05:24:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:01,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:01,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863893654] [2021-06-05 05:24:01,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863893654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:01,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656592445] [2021-06-05 05:24:01,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:01,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:01,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:01,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:02,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:24:02,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:02,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:02,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:02,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:24:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:02,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656592445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:02,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:02,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 05:24:02,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053543128] [2021-06-05 05:24:02,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:24:02,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:02,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:24:02,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:24:02,094 INFO L87 Difference]: Start difference. First operand 3450 states and 13337 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:03,379 INFO L93 Difference]: Finished difference Result 3746 states and 14106 transitions. [2021-06-05 05:24:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:24:03,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:03,386 INFO L225 Difference]: With dead ends: 3746 [2021-06-05 05:24:03,386 INFO L226 Difference]: Without dead ends: 3666 [2021-06-05 05:24:03,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1004.3ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:24:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-06-05 05:24:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3454. [2021-06-05 05:24:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 3.8662033014769763) internal successors, (13350), 3453 states have internal predecessors, (13350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 13350 transitions. [2021-06-05 05:24:03,449 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 13350 transitions. Word has length 24 [2021-06-05 05:24:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:03,449 INFO L482 AbstractCegarLoop]: Abstraction has 3454 states and 13350 transitions. [2021-06-05 05:24:03,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 13350 transitions. [2021-06-05 05:24:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:03,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:03,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:03,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-05 05:24:03,655 INFO L430 AbstractCegarLoop]: === Iteration 411 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1184183824, now seen corresponding path program 35 times [2021-06-05 05:24:03,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:03,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402477128] [2021-06-05 05:24:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:03,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:03,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402477128] [2021-06-05 05:24:03,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402477128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:03,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102597766] [2021-06-05 05:24:03,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:03,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:24:03,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:03,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:24:03,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:03,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:03,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:03,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:24:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:03,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102597766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:03,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:03,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 05:24:03,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373405298] [2021-06-05 05:24:03,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:24:03,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:03,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:24:03,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:24:03,981 INFO L87 Difference]: Start difference. First operand 3454 states and 13350 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:05,248 INFO L93 Difference]: Finished difference Result 3757 states and 14125 transitions. [2021-06-05 05:24:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:24:05,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:05,255 INFO L225 Difference]: With dead ends: 3757 [2021-06-05 05:24:05,255 INFO L226 Difference]: Without dead ends: 3676 [2021-06-05 05:24:05,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1017.8ms TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:24:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2021-06-05 05:24:05,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3459. [2021-06-05 05:24:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 3.8646616541353382) internal successors, (13364), 3458 states have internal predecessors, (13364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 13364 transitions. [2021-06-05 05:24:05,325 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 13364 transitions. Word has length 24 [2021-06-05 05:24:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:05,325 INFO L482 AbstractCegarLoop]: Abstraction has 3459 states and 13364 transitions. [2021-06-05 05:24:05,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 13364 transitions. [2021-06-05 05:24:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:05,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:05,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:05,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 05:24:05,531 INFO L430 AbstractCegarLoop]: === Iteration 412 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:05,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2082633612, now seen corresponding path program 36 times [2021-06-05 05:24:05,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:05,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455575484] [2021-06-05 05:24:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:05,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455575484] [2021-06-05 05:24:05,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455575484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479756038] [2021-06-05 05:24:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:05,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:24:05,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:05,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:05,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:05,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 05:24:05,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:05,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:05,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:05,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 05:24:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:05,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479756038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:05,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:05,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 05:24:05,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309369739] [2021-06-05 05:24:05,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:24:05,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:05,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:24:05,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:05,815 INFO L87 Difference]: Start difference. First operand 3459 states and 13364 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:06,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:06,855 INFO L93 Difference]: Finished difference Result 3665 states and 13899 transitions. [2021-06-05 05:24:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:06,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:06,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:06,862 INFO L225 Difference]: With dead ends: 3665 [2021-06-05 05:24:06,862 INFO L226 Difference]: Without dead ends: 3625 [2021-06-05 05:24:06,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 806.7ms TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:24:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2021-06-05 05:24:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 3462. [2021-06-05 05:24:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3461 states have (on average 3.863623230280266) internal successors, (13372), 3461 states have internal predecessors, (13372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 13372 transitions. [2021-06-05 05:24:06,913 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 13372 transitions. Word has length 24 [2021-06-05 05:24:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:06,913 INFO L482 AbstractCegarLoop]: Abstraction has 3462 states and 13372 transitions. [2021-06-05 05:24:06,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 13372 transitions. [2021-06-05 05:24:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:06,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:06,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:07,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable795,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:07,119 INFO L430 AbstractCegarLoop]: === Iteration 413 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:07,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:07,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1888747506, now seen corresponding path program 37 times [2021-06-05 05:24:07,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:07,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898729725] [2021-06-05 05:24:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:07,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:07,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898729725] [2021-06-05 05:24:07,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898729725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:07,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555870983] [2021-06-05 05:24:07,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:07,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 05:24:07,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:07,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:07,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:07,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 05:24:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:07,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555870983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:07,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:07,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 05:24:07,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215835619] [2021-06-05 05:24:07,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:24:07,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:07,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:24:07,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:07,434 INFO L87 Difference]: Start difference. First operand 3462 states and 13372 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:08,492 INFO L93 Difference]: Finished difference Result 3654 states and 13867 transitions. [2021-06-05 05:24:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:24:08,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:08,499 INFO L225 Difference]: With dead ends: 3654 [2021-06-05 05:24:08,499 INFO L226 Difference]: Without dead ends: 3612 [2021-06-05 05:24:08,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:24:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3612 states. [2021-06-05 05:24:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3612 to 3453. [2021-06-05 05:24:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 3.8670336037079953) internal successors, (13349), 3452 states have internal predecessors, (13349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 13349 transitions. [2021-06-05 05:24:08,550 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 13349 transitions. Word has length 24 [2021-06-05 05:24:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:08,551 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 13349 transitions. [2021-06-05 05:24:08,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:08,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 13349 transitions. [2021-06-05 05:24:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:08,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:08,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:08,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 05:24:08,756 INFO L430 AbstractCegarLoop]: === Iteration 414 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash -597575396, now seen corresponding path program 260 times [2021-06-05 05:24:08,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:08,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449684732] [2021-06-05 05:24:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:08,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449684732] [2021-06-05 05:24:08,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449684732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157746306] [2021-06-05 05:24:08,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:08,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:08,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:08,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:09,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:09,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:24:09,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:09,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:09,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:09,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 05:24:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:09,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157746306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:09,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:09,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 05:24:09,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723493616] [2021-06-05 05:24:09,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:24:09,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:09,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:24:09,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:24:09,135 INFO L87 Difference]: Start difference. First operand 3453 states and 13349 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:10,656 INFO L93 Difference]: Finished difference Result 3992 states and 14802 transitions. [2021-06-05 05:24:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:24:10,657 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:10,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:10,663 INFO L225 Difference]: With dead ends: 3992 [2021-06-05 05:24:10,664 INFO L226 Difference]: Without dead ends: 3917 [2021-06-05 05:24:10,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1127.9ms TimeCoverageRelationStatistics Valid=353, Invalid=2617, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:24:10,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2021-06-05 05:24:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3547. [2021-06-05 05:24:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 3.8705583756345177) internal successors, (13725), 3546 states have internal predecessors, (13725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 13725 transitions. [2021-06-05 05:24:10,719 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 13725 transitions. Word has length 24 [2021-06-05 05:24:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:10,719 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 13725 transitions. [2021-06-05 05:24:10,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 13725 transitions. [2021-06-05 05:24:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:10,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:10,724 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:10,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable797,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:10,925 INFO L430 AbstractCegarLoop]: === Iteration 415 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:10,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1421943676, now seen corresponding path program 261 times [2021-06-05 05:24:10,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:10,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704233323] [2021-06-05 05:24:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:11,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:11,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704233323] [2021-06-05 05:24:11,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704233323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:11,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922619689] [2021-06-05 05:24:11,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:11,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:24:11,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:11,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:11,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:11,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 05:24:11,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:11,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:11,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:11,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-06-05 05:24:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:11,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922619689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:11,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:11,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:24:11,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269500375] [2021-06-05 05:24:11,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:24:11,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:24:11,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:24:11,303 INFO L87 Difference]: Start difference. First operand 3547 states and 13725 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:12,755 INFO L93 Difference]: Finished difference Result 3934 states and 14730 transitions. [2021-06-05 05:24:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:24:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:12,763 INFO L225 Difference]: With dead ends: 3934 [2021-06-05 05:24:12,763 INFO L226 Difference]: Without dead ends: 3879 [2021-06-05 05:24:12,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1013.6ms TimeCoverageRelationStatistics Valid=293, Invalid=2157, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:24:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-06-05 05:24:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3552. [2021-06-05 05:24:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 3.8642635877217684) internal successors, (13722), 3551 states have internal predecessors, (13722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 13722 transitions. [2021-06-05 05:24:12,814 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 13722 transitions. Word has length 24 [2021-06-05 05:24:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:12,814 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 13722 transitions. [2021-06-05 05:24:12,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 13722 transitions. [2021-06-05 05:24:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:12,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:12,819 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:13,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable798,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:13,019 INFO L430 AbstractCegarLoop]: === Iteration 416 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash -380150510, now seen corresponding path program 262 times [2021-06-05 05:24:13,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:13,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802039983] [2021-06-05 05:24:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:13,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:13,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802039983] [2021-06-05 05:24:13,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802039983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:13,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121284168] [2021-06-05 05:24:13,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:13,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:13,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:13,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:13,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:13,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 05:24:13,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:13,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:13,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:13,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 05:24:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:13,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121284168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:13,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:13,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 05:24:13,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464095440] [2021-06-05 05:24:13,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:24:13,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:24:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:13,325 INFO L87 Difference]: Start difference. First operand 3552 states and 13722 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:14,309 INFO L93 Difference]: Finished difference Result 3730 states and 14250 transitions. [2021-06-05 05:24:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:24:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:14,316 INFO L225 Difference]: With dead ends: 3730 [2021-06-05 05:24:14,317 INFO L226 Difference]: Without dead ends: 3704 [2021-06-05 05:24:14,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 722.7ms TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:24:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-05 05:24:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3564. [2021-06-05 05:24:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 3.8635980914959305) internal successors, (13766), 3563 states have internal predecessors, (13766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 13766 transitions. [2021-06-05 05:24:14,371 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 13766 transitions. Word has length 24 [2021-06-05 05:24:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:14,371 INFO L482 AbstractCegarLoop]: Abstraction has 3564 states and 13766 transitions. [2021-06-05 05:24:14,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 13766 transitions. [2021-06-05 05:24:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:14,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:14,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:14,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 05:24:14,577 INFO L430 AbstractCegarLoop]: === Iteration 417 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1213888950, now seen corresponding path program 263 times [2021-06-05 05:24:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:14,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181229489] [2021-06-05 05:24:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:14,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:14,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181229489] [2021-06-05 05:24:14,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181229489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:14,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850050111] [2021-06-05 05:24:14,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:14,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:14,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:14,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 05:24:14,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:14,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:14,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:14,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 05:24:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:14,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850050111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:14,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:14,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 05:24:14,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72366566] [2021-06-05 05:24:14,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:24:14,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:24:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:14,862 INFO L87 Difference]: Start difference. First operand 3564 states and 13766 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:15,970 INFO L93 Difference]: Finished difference Result 3752 states and 14293 transitions. [2021-06-05 05:24:15,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:24:15,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:15,977 INFO L225 Difference]: With dead ends: 3752 [2021-06-05 05:24:15,977 INFO L226 Difference]: Without dead ends: 3729 [2021-06-05 05:24:15,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 800.6ms TimeCoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:24:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-06-05 05:24:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3571. [2021-06-05 05:24:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.861624649859944) internal successors, (13786), 3570 states have internal predecessors, (13786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 13786 transitions. [2021-06-05 05:24:16,028 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 13786 transitions. Word has length 24 [2021-06-05 05:24:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:16,028 INFO L482 AbstractCegarLoop]: Abstraction has 3571 states and 13786 transitions. [2021-06-05 05:24:16,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 13786 transitions. [2021-06-05 05:24:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:16,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:16,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:16,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:16,234 INFO L430 AbstractCegarLoop]: === Iteration 418 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:16,234 INFO L82 PathProgramCache]: Analyzing trace with hash 44593446, now seen corresponding path program 38 times [2021-06-05 05:24:16,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:16,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129106064] [2021-06-05 05:24:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:16,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:16,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129106064] [2021-06-05 05:24:16,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129106064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:16,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721635828] [2021-06-05 05:24:16,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:16,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:16,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:16,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:16,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:16,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:16,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:24:16,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:16,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:16,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:16,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 05:24:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:16,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721635828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:16,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:16,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 05:24:16,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429190771] [2021-06-05 05:24:16,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:24:16,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:16,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:24:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:24:16,603 INFO L87 Difference]: Start difference. First operand 3571 states and 13786 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:18,169 INFO L93 Difference]: Finished difference Result 3868 states and 14553 transitions. [2021-06-05 05:24:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:24:18,169 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:18,176 INFO L225 Difference]: With dead ends: 3868 [2021-06-05 05:24:18,176 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 05:24:18,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1268.6ms TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:24:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 05:24:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3583. [2021-06-05 05:24:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 3.8615298715801227) internal successors, (13832), 3582 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 13832 transitions. [2021-06-05 05:24:18,232 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 13832 transitions. Word has length 24 [2021-06-05 05:24:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:18,233 INFO L482 AbstractCegarLoop]: Abstraction has 3583 states and 13832 transitions. [2021-06-05 05:24:18,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 13832 transitions. [2021-06-05 05:24:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:18,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:18,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:18,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-06-05 05:24:18,438 INFO L430 AbstractCegarLoop]: === Iteration 419 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash -983556414, now seen corresponding path program 39 times [2021-06-05 05:24:18,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:18,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544268482] [2021-06-05 05:24:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:18,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:18,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544268482] [2021-06-05 05:24:18,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544268482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:18,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126157570] [2021-06-05 05:24:18,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:18,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:24:18,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:18,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:18,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:18,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:18,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:24:18,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:18,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:18,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:18,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 05:24:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:18,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126157570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:18,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:18,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 05:24:18,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458546786] [2021-06-05 05:24:18,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:24:18,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:18,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:24:18,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:24:18,818 INFO L87 Difference]: Start difference. First operand 3583 states and 13832 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:20,224 INFO L93 Difference]: Finished difference Result 3811 states and 14413 transitions. [2021-06-05 05:24:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:24:20,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:20,232 INFO L225 Difference]: With dead ends: 3811 [2021-06-05 05:24:20,232 INFO L226 Difference]: Without dead ends: 3757 [2021-06-05 05:24:20,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1180.9ms TimeCoverageRelationStatistics Valid=279, Invalid=2073, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:24:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2021-06-05 05:24:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3592. [2021-06-05 05:24:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 3.8596491228070176) internal successors, (13860), 3591 states have internal predecessors, (13860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 13860 transitions. [2021-06-05 05:24:20,285 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 13860 transitions. Word has length 24 [2021-06-05 05:24:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:20,285 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 13860 transitions. [2021-06-05 05:24:20,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 13860 transitions. [2021-06-05 05:24:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:20,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:20,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:20,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:20,491 INFO L430 AbstractCegarLoop]: === Iteration 420 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:20,492 INFO L82 PathProgramCache]: Analyzing trace with hash -659970236, now seen corresponding path program 40 times [2021-06-05 05:24:20,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:20,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349165441] [2021-06-05 05:24:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:20,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:20,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349165441] [2021-06-05 05:24:20,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349165441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:20,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951207388] [2021-06-05 05:24:20,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:20,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:20,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:20,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:20,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:20,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 05:24:20,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:20,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:20,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:20,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 05:24:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:20,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951207388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:20,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:20,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 05:24:20,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201499644] [2021-06-05 05:24:20,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:24:20,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:24:20,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:20,795 INFO L87 Difference]: Start difference. First operand 3592 states and 13860 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:22,207 INFO L93 Difference]: Finished difference Result 3849 states and 14541 transitions. [2021-06-05 05:24:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:24:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:22,214 INFO L225 Difference]: With dead ends: 3849 [2021-06-05 05:24:22,214 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 05:24:22,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1062.7ms TimeCoverageRelationStatistics Valid=303, Invalid=2247, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:24:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 05:24:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3599. [2021-06-05 05:24:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3599 states, 3598 states have (on average 3.859922178988327) internal successors, (13888), 3598 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 13888 transitions. [2021-06-05 05:24:22,266 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 13888 transitions. Word has length 24 [2021-06-05 05:24:22,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:22,266 INFO L482 AbstractCegarLoop]: Abstraction has 3599 states and 13888 transitions. [2021-06-05 05:24:22,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 13888 transitions. [2021-06-05 05:24:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:22,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:22,272 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:22,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable810 [2021-06-05 05:24:22,472 INFO L430 AbstractCegarLoop]: === Iteration 421 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:22,472 INFO L82 PathProgramCache]: Analyzing trace with hash -974941220, now seen corresponding path program 41 times [2021-06-05 05:24:22,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:22,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402612272] [2021-06-05 05:24:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:22,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:22,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402612272] [2021-06-05 05:24:22,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402612272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:22,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39762003] [2021-06-05 05:24:22,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:22,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:24:22,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:22,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:22,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:22,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:24:22,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:22,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:22,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:22,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:24:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:22,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39762003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:22,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:22,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 05:24:22,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260222402] [2021-06-05 05:24:22,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:24:22,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:22,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:24:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:24:22,772 INFO L87 Difference]: Start difference. First operand 3599 states and 13888 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:23,878 INFO L93 Difference]: Finished difference Result 3985 states and 15021 transitions. [2021-06-05 05:24:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:24:23,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:23,886 INFO L225 Difference]: With dead ends: 3985 [2021-06-05 05:24:23,886 INFO L226 Difference]: Without dead ends: 3959 [2021-06-05 05:24:23,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 877.9ms TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:24:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-05 05:24:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3669. [2021-06-05 05:24:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3669 states, 3668 states have (on average 3.8625954198473282) internal successors, (14168), 3668 states have internal predecessors, (14168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 14168 transitions. [2021-06-05 05:24:23,944 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 14168 transitions. Word has length 24 [2021-06-05 05:24:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:23,945 INFO L482 AbstractCegarLoop]: Abstraction has 3669 states and 14168 transitions. [2021-06-05 05:24:23,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 14168 transitions. [2021-06-05 05:24:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:23,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:23,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:24,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-05 05:24:24,150 INFO L430 AbstractCegarLoop]: === Iteration 422 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:24,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:24,151 INFO L82 PathProgramCache]: Analyzing trace with hash -234349534, now seen corresponding path program 42 times [2021-06-05 05:24:24,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:24,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533944932] [2021-06-05 05:24:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:24,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:24,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533944932] [2021-06-05 05:24:24,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533944932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:24,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725932531] [2021-06-05 05:24:24,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:24,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:24:24,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:24,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:24,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:24,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:24:24,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:24,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:24,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:24,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 05:24:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:24,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725932531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:24,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:24,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:24:24,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849973722] [2021-06-05 05:24:24,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:24:24,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:24,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:24:24,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:24:24,569 INFO L87 Difference]: Start difference. First operand 3669 states and 14168 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:25,803 INFO L93 Difference]: Finished difference Result 3868 states and 14708 transitions. [2021-06-05 05:24:25,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:24:25,803 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:25,810 INFO L225 Difference]: With dead ends: 3868 [2021-06-05 05:24:25,810 INFO L226 Difference]: Without dead ends: 3827 [2021-06-05 05:24:25,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1065.5ms TimeCoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:24:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-06-05 05:24:25,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3676. [2021-06-05 05:24:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3675 states have (on average 3.859863945578231) internal successors, (14185), 3675 states have internal predecessors, (14185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 14185 transitions. [2021-06-05 05:24:25,865 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 14185 transitions. Word has length 24 [2021-06-05 05:24:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:25,865 INFO L482 AbstractCegarLoop]: Abstraction has 3676 states and 14185 transitions. [2021-06-05 05:24:25,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 14185 transitions. [2021-06-05 05:24:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:25,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:25,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:26,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:26,071 INFO L430 AbstractCegarLoop]: === Iteration 423 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:26,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1484751672, now seen corresponding path program 264 times [2021-06-05 05:24:26,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:26,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343783257] [2021-06-05 05:24:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:26,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:26,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343783257] [2021-06-05 05:24:26,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343783257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:26,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944791026] [2021-06-05 05:24:26,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:26,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:24:26,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:26,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:26,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:26,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:26,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:24:26,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:26,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:26,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:26,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 05:24:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:26,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944791026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:26,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:26,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:24:26,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251233118] [2021-06-05 05:24:26,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:24:26,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:26,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:24:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:24:26,480 INFO L87 Difference]: Start difference. First operand 3676 states and 14185 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:27,829 INFO L93 Difference]: Finished difference Result 3954 states and 14929 transitions. [2021-06-05 05:24:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:24:27,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:27,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:27,836 INFO L225 Difference]: With dead ends: 3954 [2021-06-05 05:24:27,836 INFO L226 Difference]: Without dead ends: 3908 [2021-06-05 05:24:27,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1095.2ms TimeCoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:24:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2021-06-05 05:24:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 3697. [2021-06-05 05:24:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3697 states, 3696 states have (on average 3.856060606060606) internal successors, (14252), 3696 states have internal predecessors, (14252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3697 states to 3697 states and 14252 transitions. [2021-06-05 05:24:27,889 INFO L78 Accepts]: Start accepts. Automaton has 3697 states and 14252 transitions. Word has length 24 [2021-06-05 05:24:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:27,889 INFO L482 AbstractCegarLoop]: Abstraction has 3697 states and 14252 transitions. [2021-06-05 05:24:27,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3697 states and 14252 transitions. [2021-06-05 05:24:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:27,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:27,894 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:28,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,412 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:28,095 INFO L430 AbstractCegarLoop]: === Iteration 424 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:28,095 INFO L82 PathProgramCache]: Analyzing trace with hash -306109502, now seen corresponding path program 265 times [2021-06-05 05:24:28,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:28,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493356942] [2021-06-05 05:24:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:28,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493356942] [2021-06-05 05:24:28,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493356942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034906229] [2021-06-05 05:24:28,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:28,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:28,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:28,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 05:24:28,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:28,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:28,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:28,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 05:24:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:28,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034906229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:28,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:28,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 05:24:28,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352911887] [2021-06-05 05:24:28,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:24:28,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:28,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:24:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:28,404 INFO L87 Difference]: Start difference. First operand 3697 states and 14252 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:29,041 INFO L93 Difference]: Finished difference Result 3861 states and 14710 transitions. [2021-06-05 05:24:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:24:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:29,049 INFO L225 Difference]: With dead ends: 3861 [2021-06-05 05:24:29,049 INFO L226 Difference]: Without dead ends: 3851 [2021-06-05 05:24:29,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:24:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-05 05:24:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3699. [2021-06-05 05:24:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3698 states have (on average 3.855868036776636) internal successors, (14259), 3698 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 14259 transitions. [2021-06-05 05:24:29,102 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 14259 transitions. Word has length 24 [2021-06-05 05:24:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:29,102 INFO L482 AbstractCegarLoop]: Abstraction has 3699 states and 14259 transitions. [2021-06-05 05:24:29,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 14259 transitions. [2021-06-05 05:24:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:29,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:29,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:29,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable820,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:29,308 INFO L430 AbstractCegarLoop]: === Iteration 425 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash -572743186, now seen corresponding path program 43 times [2021-06-05 05:24:29,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:29,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204132014] [2021-06-05 05:24:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:29,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:29,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204132014] [2021-06-05 05:24:29,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204132014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:29,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155106982] [2021-06-05 05:24:29,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:29,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:29,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 05:24:29,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:29,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:29,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:29,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 05:24:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:29,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155106982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:29,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:29,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 05:24:29,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156556859] [2021-06-05 05:24:29,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:24:29,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:29,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:24:29,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:29,587 INFO L87 Difference]: Start difference. First operand 3699 states and 14259 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:30,184 INFO L93 Difference]: Finished difference Result 3833 states and 14656 transitions. [2021-06-05 05:24:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:24:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:30,191 INFO L225 Difference]: With dead ends: 3833 [2021-06-05 05:24:30,192 INFO L226 Difference]: Without dead ends: 3824 [2021-06-05 05:24:30,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:24:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2021-06-05 05:24:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3704. [2021-06-05 05:24:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.857142857142857) internal successors, (14283), 3703 states have internal predecessors, (14283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 14283 transitions. [2021-06-05 05:24:30,242 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 14283 transitions. Word has length 24 [2021-06-05 05:24:30,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:30,243 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 14283 transitions. [2021-06-05 05:24:30,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:30,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 14283 transitions. [2021-06-05 05:24:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:30,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:30,248 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:30,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable821 [2021-06-05 05:24:30,448 INFO L430 AbstractCegarLoop]: === Iteration 426 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:30,448 INFO L82 PathProgramCache]: Analyzing trace with hash -249157008, now seen corresponding path program 44 times [2021-06-05 05:24:30,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:30,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851304201] [2021-06-05 05:24:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:30,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:30,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851304201] [2021-06-05 05:24:30,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851304201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:30,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110316298] [2021-06-05 05:24:30,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:30,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:30,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:30,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:30,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:30,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 05:24:30,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:30,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:30,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:30,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 05:24:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:30,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110316298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:30,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:30,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:24:30,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468242264] [2021-06-05 05:24:30,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:24:30,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:30,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:24:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:24:30,865 INFO L87 Difference]: Start difference. First operand 3704 states and 14283 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:31,683 INFO L93 Difference]: Finished difference Result 3927 states and 14879 transitions. [2021-06-05 05:24:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:24:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:31,690 INFO L225 Difference]: With dead ends: 3927 [2021-06-05 05:24:31,691 INFO L226 Difference]: Without dead ends: 3897 [2021-06-05 05:24:31,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 669.3ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:24:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2021-06-05 05:24:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3704. [2021-06-05 05:24:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.857142857142857) internal successors, (14283), 3703 states have internal predecessors, (14283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 14283 transitions. [2021-06-05 05:24:31,747 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 14283 transitions. Word has length 24 [2021-06-05 05:24:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:31,747 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 14283 transitions. [2021-06-05 05:24:31,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 14283 transitions. [2021-06-05 05:24:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:31,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:31,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:31,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable822 [2021-06-05 05:24:31,952 INFO L430 AbstractCegarLoop]: === Iteration 427 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:31,953 INFO L82 PathProgramCache]: Analyzing trace with hash 287765660, now seen corresponding path program 266 times [2021-06-05 05:24:31,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:31,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769503287] [2021-06-05 05:24:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:32,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:32,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769503287] [2021-06-05 05:24:32,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769503287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:32,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500951117] [2021-06-05 05:24:32,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:32,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:32,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:32,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:32,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:32,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:24:32,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:24:32,268 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 05:24:32,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:32,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-06-05 05:24:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:32,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500951117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:32,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:32,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:24:32,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768772607] [2021-06-05 05:24:32,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:24:32,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:32,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:24:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:24:32,358 INFO L87 Difference]: Start difference. First operand 3704 states and 14283 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:33,531 INFO L93 Difference]: Finished difference Result 3922 states and 14870 transitions. [2021-06-05 05:24:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:24:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:33,538 INFO L225 Difference]: With dead ends: 3922 [2021-06-05 05:24:33,539 INFO L226 Difference]: Without dead ends: 3874 [2021-06-05 05:24:33,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 845.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:24:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3874 states. [2021-06-05 05:24:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3874 to 3705. [2021-06-05 05:24:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3704 states have (on average 3.8569114470842334) internal successors, (14286), 3704 states have internal predecessors, (14286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 14286 transitions. [2021-06-05 05:24:33,593 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 14286 transitions. Word has length 24 [2021-06-05 05:24:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:33,593 INFO L482 AbstractCegarLoop]: Abstraction has 3705 states and 14286 transitions. [2021-06-05 05:24:33,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 14286 transitions. [2021-06-05 05:24:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:33,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:33,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:33,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:33,799 INFO L430 AbstractCegarLoop]: === Iteration 428 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash 82847526, now seen corresponding path program 45 times [2021-06-05 05:24:33,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:33,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869654973] [2021-06-05 05:24:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:33,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:33,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869654973] [2021-06-05 05:24:33,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869654973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:33,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238651383] [2021-06-05 05:24:33,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:33,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:24:33,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:33,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:33,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:34,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:34,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 51 [2021-06-05 05:24:34,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 05:24:34,171 INFO L628 ElimStorePlain]: treesize reduction 129, result has 17.8 percent of original size [2021-06-05 05:24:34,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:34,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:28 [2021-06-05 05:24:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:34,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238651383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:34,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:34,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 05:24:34,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012542220] [2021-06-05 05:24:34,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:24:34,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:34,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:24:34,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:24:34,263 INFO L87 Difference]: Start difference. First operand 3705 states and 14286 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:35,402 INFO L93 Difference]: Finished difference Result 3880 states and 14772 transitions. [2021-06-05 05:24:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:24:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:35,410 INFO L225 Difference]: With dead ends: 3880 [2021-06-05 05:24:35,410 INFO L226 Difference]: Without dead ends: 3850 [2021-06-05 05:24:35,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 896.2ms TimeCoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:24:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2021-06-05 05:24:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3722. [2021-06-05 05:24:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 3.856758935769954) internal successors, (14351), 3721 states have internal predecessors, (14351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 14351 transitions. [2021-06-05 05:24:35,468 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 14351 transitions. Word has length 24 [2021-06-05 05:24:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:35,468 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 14351 transitions. [2021-06-05 05:24:35,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 14351 transitions. [2021-06-05 05:24:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:35,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:35,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:35,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-06-05 05:24:35,674 INFO L430 AbstractCegarLoop]: === Iteration 429 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:35,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1902673252, now seen corresponding path program 46 times [2021-06-05 05:24:35,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:35,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615658302] [2021-06-05 05:24:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:35,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615658302] [2021-06-05 05:24:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615658302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573559423] [2021-06-05 05:24:35,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:35,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:35,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:35,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:35,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:35,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:24:35,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:35,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:35,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:35,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:24:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:36,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573559423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:36,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:36,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 05:24:36,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149405557] [2021-06-05 05:24:36,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:24:36,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:36,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:24:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:24:36,018 INFO L87 Difference]: Start difference. First operand 3722 states and 14351 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:36,751 INFO L93 Difference]: Finished difference Result 3859 states and 14748 transitions. [2021-06-05 05:24:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:24:36,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:36,759 INFO L225 Difference]: With dead ends: 3859 [2021-06-05 05:24:36,759 INFO L226 Difference]: Without dead ends: 3850 [2021-06-05 05:24:36,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 573.5ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:36,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2021-06-05 05:24:36,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3722. [2021-06-05 05:24:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 3.857833915614082) internal successors, (14355), 3721 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 14355 transitions. [2021-06-05 05:24:36,827 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 14355 transitions. Word has length 24 [2021-06-05 05:24:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:36,828 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 14355 transitions. [2021-06-05 05:24:36,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 14355 transitions. [2021-06-05 05:24:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:36,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:36,833 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:37,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:37,034 INFO L430 AbstractCegarLoop]: === Iteration 430 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:37,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1920666464, now seen corresponding path program 267 times [2021-06-05 05:24:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:37,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122679349] [2021-06-05 05:24:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:37,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:37,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122679349] [2021-06-05 05:24:37,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122679349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:37,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563446792] [2021-06-05 05:24:37,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:37,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:24:37,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:37,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:37,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:37,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:24:37,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:37,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:37,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:37,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:24:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:37,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563446792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:37,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:37,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:24:37,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733075640] [2021-06-05 05:24:37,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:24:37,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:37,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:24:37,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:24:37,446 INFO L87 Difference]: Start difference. First operand 3722 states and 14355 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:38,255 INFO L93 Difference]: Finished difference Result 4132 states and 15604 transitions. [2021-06-05 05:24:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:38,262 INFO L225 Difference]: With dead ends: 4132 [2021-06-05 05:24:38,262 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 05:24:38,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:24:38,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 05:24:38,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3725. [2021-06-05 05:24:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.8574113856068744) internal successors, (14365), 3724 states have internal predecessors, (14365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 14365 transitions. [2021-06-05 05:24:38,316 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 14365 transitions. Word has length 24 [2021-06-05 05:24:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:38,316 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 14365 transitions. [2021-06-05 05:24:38,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 14365 transitions. [2021-06-05 05:24:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:38,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:38,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:38,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 05:24:38,522 INFO L430 AbstractCegarLoop]: === Iteration 431 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:38,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:38,522 INFO L82 PathProgramCache]: Analyzing trace with hash 30631814, now seen corresponding path program 268 times [2021-06-05 05:24:38,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:38,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856105295] [2021-06-05 05:24:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:38,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:38,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856105295] [2021-06-05 05:24:38,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856105295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:38,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655999251] [2021-06-05 05:24:38,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:38,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:38,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:38,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:24:38,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:38,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:38,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:38,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:24:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:38,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655999251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:38,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:38,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:24:38,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190208512] [2021-06-05 05:24:38,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:24:38,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:38,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:24:38,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:24:38,862 INFO L87 Difference]: Start difference. First operand 3725 states and 14365 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:39,754 INFO L93 Difference]: Finished difference Result 4103 states and 15510 transitions. [2021-06-05 05:24:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:24:39,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:39,761 INFO L225 Difference]: With dead ends: 4103 [2021-06-05 05:24:39,762 INFO L226 Difference]: Without dead ends: 4094 [2021-06-05 05:24:39,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 764.0ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:24:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-06-05 05:24:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 3726. [2021-06-05 05:24:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3726 states, 3725 states have (on average 3.8574496644295304) internal successors, (14369), 3725 states have internal predecessors, (14369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 14369 transitions. [2021-06-05 05:24:39,815 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 14369 transitions. Word has length 24 [2021-06-05 05:24:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:39,815 INFO L482 AbstractCegarLoop]: Abstraction has 3726 states and 14369 transitions. [2021-06-05 05:24:39,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 14369 transitions. [2021-06-05 05:24:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:39,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:39,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:40,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:40,021 INFO L430 AbstractCegarLoop]: === Iteration 432 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:40,021 INFO L82 PathProgramCache]: Analyzing trace with hash -855166466, now seen corresponding path program 269 times [2021-06-05 05:24:40,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:40,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390715225] [2021-06-05 05:24:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:40,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390715225] [2021-06-05 05:24:40,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390715225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680845533] [2021-06-05 05:24:40,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:40,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:24:40,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:40,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:24:40,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:40,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:40,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:40,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:24:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:40,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680845533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:40,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:40,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:24:40,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364432669] [2021-06-05 05:24:40,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:24:40,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:40,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:24:40,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:24:40,363 INFO L87 Difference]: Start difference. First operand 3726 states and 14369 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:41,404 INFO L93 Difference]: Finished difference Result 4151 states and 15678 transitions. [2021-06-05 05:24:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:24:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:41,411 INFO L225 Difference]: With dead ends: 4151 [2021-06-05 05:24:41,411 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 05:24:41,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 795.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:24:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 05:24:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3725. [2021-06-05 05:24:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.8579484425349087) internal successors, (14367), 3724 states have internal predecessors, (14367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 14367 transitions. [2021-06-05 05:24:41,466 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 14367 transitions. Word has length 24 [2021-06-05 05:24:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:41,466 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 14367 transitions. [2021-06-05 05:24:41,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 14367 transitions. [2021-06-05 05:24:41,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:41,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:41,471 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:41,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable846 [2021-06-05 05:24:41,672 INFO L430 AbstractCegarLoop]: === Iteration 433 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:41,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1883316326, now seen corresponding path program 270 times [2021-06-05 05:24:41,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:41,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734388841] [2021-06-05 05:24:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:41,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:41,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734388841] [2021-06-05 05:24:41,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734388841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:41,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824221760] [2021-06-05 05:24:41,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:41,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:24:41,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:42,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:42,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:24:42,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:42,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:42,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:42,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:24:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:42,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824221760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:42,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:42,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:24:42,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579126150] [2021-06-05 05:24:42,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:24:42,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:24:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:24:42,086 INFO L87 Difference]: Start difference. First operand 3725 states and 14367 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:42,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:42,804 INFO L93 Difference]: Finished difference Result 4089 states and 15483 transitions. [2021-06-05 05:24:42,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:42,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:42,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:42,812 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 05:24:42,812 INFO L226 Difference]: Without dead ends: 4080 [2021-06-05 05:24:42,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 689.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:24:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2021-06-05 05:24:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 3730. [2021-06-05 05:24:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3729 states have (on average 3.857066237597211) internal successors, (14383), 3729 states have internal predecessors, (14383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 14383 transitions. [2021-06-05 05:24:42,866 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 14383 transitions. Word has length 24 [2021-06-05 05:24:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:42,867 INFO L482 AbstractCegarLoop]: Abstraction has 3730 states and 14383 transitions. [2021-06-05 05:24:42,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 14383 transitions. [2021-06-05 05:24:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:42,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:42,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:43,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:43,072 INFO L430 AbstractCegarLoop]: === Iteration 434 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1559730148, now seen corresponding path program 271 times [2021-06-05 05:24:43,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:43,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199370330] [2021-06-05 05:24:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:43,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:43,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199370330] [2021-06-05 05:24:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199370330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:43,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443398443] [2021-06-05 05:24:43,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:43,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:43,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:43,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:24:43,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:43,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:43,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:43,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:24:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:43,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443398443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:43,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:43,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:24:43,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664096055] [2021-06-05 05:24:43,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:24:43,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:24:43,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:24:43,430 INFO L87 Difference]: Start difference. First operand 3730 states and 14383 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:44,201 INFO L93 Difference]: Finished difference Result 4164 states and 15742 transitions. [2021-06-05 05:24:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:24:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:44,209 INFO L225 Difference]: With dead ends: 4164 [2021-06-05 05:24:44,209 INFO L226 Difference]: Without dead ends: 4153 [2021-06-05 05:24:44,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:24:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-05 05:24:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 3724. [2021-06-05 05:24:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3724 states, 3723 states have (on average 3.8579102874026323) internal successors, (14363), 3723 states have internal predecessors, (14363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3724 states to 3724 states and 14363 transitions. [2021-06-05 05:24:44,267 INFO L78 Accepts]: Start accepts. Automaton has 3724 states and 14363 transitions. Word has length 24 [2021-06-05 05:24:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:44,267 INFO L482 AbstractCegarLoop]: Abstraction has 3724 states and 14363 transitions. [2021-06-05 05:24:44,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:44,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3724 states and 14363 transitions. [2021-06-05 05:24:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:44,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:44,272 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:44,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:44,473 INFO L430 AbstractCegarLoop]: === Iteration 435 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash 208494864, now seen corresponding path program 272 times [2021-06-05 05:24:44,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:44,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143430257] [2021-06-05 05:24:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:44,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:44,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143430257] [2021-06-05 05:24:44,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143430257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:44,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52156911] [2021-06-05 05:24:44,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:44,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:44,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:44,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:44,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:44,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:44,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:44,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:24:44,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:44,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:44,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:44,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:24:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:44,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52156911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:44,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:44,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:24:44,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200506056] [2021-06-05 05:24:44,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:24:44,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:24:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:24:44,929 INFO L87 Difference]: Start difference. First operand 3724 states and 14363 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:45,792 INFO L93 Difference]: Finished difference Result 4152 states and 15661 transitions. [2021-06-05 05:24:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:24:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:45,800 INFO L225 Difference]: With dead ends: 4152 [2021-06-05 05:24:45,800 INFO L226 Difference]: Without dead ends: 4143 [2021-06-05 05:24:45,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:24:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-06-05 05:24:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3724. [2021-06-05 05:24:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3724 states, 3723 states have (on average 3.8579102874026323) internal successors, (14363), 3723 states have internal predecessors, (14363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3724 states to 3724 states and 14363 transitions. [2021-06-05 05:24:45,857 INFO L78 Accepts]: Start accepts. Automaton has 3724 states and 14363 transitions. Word has length 24 [2021-06-05 05:24:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:45,857 INFO L482 AbstractCegarLoop]: Abstraction has 3724 states and 14363 transitions. [2021-06-05 05:24:45,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3724 states and 14363 transitions. [2021-06-05 05:24:45,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:45,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:45,863 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:46,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable850,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:46,063 INFO L430 AbstractCegarLoop]: === Iteration 436 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:46,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1299587194, now seen corresponding path program 273 times [2021-06-05 05:24:46,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:46,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463381402] [2021-06-05 05:24:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:46,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:46,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463381402] [2021-06-05 05:24:46,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463381402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:46,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580644893] [2021-06-05 05:24:46,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:46,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:24:46,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:46,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:24:46,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:46,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:46,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:24:46,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:24:46,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:46,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:46,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:46,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:24:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:46,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580644893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:46,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:46,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:24:46,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183168391] [2021-06-05 05:24:46,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:24:46,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:24:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:24:46,478 INFO L87 Difference]: Start difference. First operand 3724 states and 14363 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:47,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:47,740 INFO L93 Difference]: Finished difference Result 4201 states and 15826 transitions. [2021-06-05 05:24:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:24:47,741 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:47,748 INFO L225 Difference]: With dead ends: 4201 [2021-06-05 05:24:47,748 INFO L226 Difference]: Without dead ends: 4182 [2021-06-05 05:24:47,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 921.7ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:24:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2021-06-05 05:24:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 3728. [2021-06-05 05:24:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 3.856989535819694) internal successors, (14375), 3727 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 14375 transitions. [2021-06-05 05:24:47,801 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 14375 transitions. Word has length 24 [2021-06-05 05:24:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:47,801 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 14375 transitions. [2021-06-05 05:24:47,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:47,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 14375 transitions. [2021-06-05 05:24:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:47,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:47,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:48,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-05 05:24:48,007 INFO L430 AbstractCegarLoop]: === Iteration 437 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash 636656318, now seen corresponding path program 274 times [2021-06-05 05:24:48,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:48,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15258461] [2021-06-05 05:24:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:48,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:48,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15258461] [2021-06-05 05:24:48,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15258461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:48,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487223075] [2021-06-05 05:24:48,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:48,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:48,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:48,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:48,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:48,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:24:48,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:48,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:48,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:48,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:24:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:48,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487223075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:48,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:48,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:24:48,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61224788] [2021-06-05 05:24:48,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:24:48,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:48,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:24:48,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:24:48,350 INFO L87 Difference]: Start difference. First operand 3728 states and 14375 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:49,295 INFO L93 Difference]: Finished difference Result 4160 states and 15705 transitions. [2021-06-05 05:24:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:24:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:49,303 INFO L225 Difference]: With dead ends: 4160 [2021-06-05 05:24:49,303 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 05:24:49,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 784.3ms TimeCoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:24:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 05:24:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3727. [2021-06-05 05:24:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 3726 states have (on average 3.8580246913580245) internal successors, (14375), 3726 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 14375 transitions. [2021-06-05 05:24:49,357 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 14375 transitions. Word has length 24 [2021-06-05 05:24:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:49,358 INFO L482 AbstractCegarLoop]: Abstraction has 3727 states and 14375 transitions. [2021-06-05 05:24:49,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 14375 transitions. [2021-06-05 05:24:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:49,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:49,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:49,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:49,568 INFO L430 AbstractCegarLoop]: === Iteration 438 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:49,568 INFO L82 PathProgramCache]: Analyzing trace with hash 460114886, now seen corresponding path program 275 times [2021-06-05 05:24:49,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:49,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371231904] [2021-06-05 05:24:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:49,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:49,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371231904] [2021-06-05 05:24:49,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371231904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:49,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224134084] [2021-06-05 05:24:49,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:49,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:24:49,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:49,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:49,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:24:49,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:49,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:49,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:49,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:24:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:49,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224134084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:49,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:49,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:24:49,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574956100] [2021-06-05 05:24:49,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:24:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:24:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:24:49,903 INFO L87 Difference]: Start difference. First operand 3727 states and 14375 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:50,559 INFO L93 Difference]: Finished difference Result 4115 states and 15566 transitions. [2021-06-05 05:24:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:24:50,560 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:50,567 INFO L225 Difference]: With dead ends: 4115 [2021-06-05 05:24:50,568 INFO L226 Difference]: Without dead ends: 4106 [2021-06-05 05:24:50,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:24:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-06-05 05:24:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3729. [2021-06-05 05:24:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 3.8575643776824036) internal successors, (14381), 3728 states have internal predecessors, (14381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 14381 transitions. [2021-06-05 05:24:50,629 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 14381 transitions. Word has length 24 [2021-06-05 05:24:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:50,629 INFO L482 AbstractCegarLoop]: Abstraction has 3729 states and 14381 transitions. [2021-06-05 05:24:50,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 14381 transitions. [2021-06-05 05:24:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:50,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:50,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:50,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-06-05 05:24:50,850 INFO L430 AbstractCegarLoop]: === Iteration 439 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash -373623554, now seen corresponding path program 276 times [2021-06-05 05:24:50,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:50,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246182329] [2021-06-05 05:24:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:51,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:51,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246182329] [2021-06-05 05:24:51,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246182329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:51,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598835046] [2021-06-05 05:24:51,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:51,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:24:51,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:51,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:24:51,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:51,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:51,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:51,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 05:24:51,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:51,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:51,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:51,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:129 [2021-06-05 05:24:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:51,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598835046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:51,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:51,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:24:51,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524958205] [2021-06-05 05:24:51,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:24:51,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:51,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:24:51,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:24:51,332 INFO L87 Difference]: Start difference. First operand 3729 states and 14381 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:52,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:52,462 INFO L93 Difference]: Finished difference Result 4171 states and 15650 transitions. [2021-06-05 05:24:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:24:52,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:52,469 INFO L225 Difference]: With dead ends: 4171 [2021-06-05 05:24:52,469 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 05:24:52,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1083.2ms TimeCoverageRelationStatistics Valid=365, Invalid=1987, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:24:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 05:24:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3733. [2021-06-05 05:24:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.856913183279743) internal successors, (14394), 3732 states have internal predecessors, (14394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 14394 transitions. [2021-06-05 05:24:52,526 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 14394 transitions. Word has length 24 [2021-06-05 05:24:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:52,526 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 14394 transitions. [2021-06-05 05:24:52,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 14394 transitions. [2021-06-05 05:24:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:52,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:52,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:52,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable854,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:52,732 INFO L430 AbstractCegarLoop]: === Iteration 440 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:52,732 INFO L82 PathProgramCache]: Analyzing trace with hash 408210246, now seen corresponding path program 277 times [2021-06-05 05:24:52,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:52,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908725773] [2021-06-05 05:24:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:52,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:52,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908725773] [2021-06-05 05:24:52,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908725773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:52,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518310638] [2021-06-05 05:24:52,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:52,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:52,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:53,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:24:53,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:53,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:53,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:53,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:24:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:53,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518310638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:53,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:53,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:24:53,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997308120] [2021-06-05 05:24:53,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:24:53,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:24:53,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:24:53,043 INFO L87 Difference]: Start difference. First operand 3733 states and 14394 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:53,707 INFO L93 Difference]: Finished difference Result 4076 states and 15440 transitions. [2021-06-05 05:24:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:24:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:53,714 INFO L225 Difference]: With dead ends: 4076 [2021-06-05 05:24:53,714 INFO L226 Difference]: Without dead ends: 4066 [2021-06-05 05:24:53,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:24:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2021-06-05 05:24:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 3728. [2021-06-05 05:24:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 3.8564529111886237) internal successors, (14373), 3727 states have internal predecessors, (14373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 14373 transitions. [2021-06-05 05:24:53,782 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 14373 transitions. Word has length 24 [2021-06-05 05:24:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:53,782 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 14373 transitions. [2021-06-05 05:24:53,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 14373 transitions. [2021-06-05 05:24:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:53,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:53,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:53,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-05 05:24:53,988 INFO L430 AbstractCegarLoop]: === Iteration 441 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:53,988 INFO L82 PathProgramCache]: Analyzing trace with hash -652436026, now seen corresponding path program 278 times [2021-06-05 05:24:53,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:53,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276089450] [2021-06-05 05:24:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:54,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:54,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276089450] [2021-06-05 05:24:54,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276089450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:54,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867488848] [2021-06-05 05:24:54,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:54,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:54,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:54,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:54,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:54,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 05:24:54,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:24:54,368 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-05 05:24:54,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:54,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 05:24:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:54,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867488848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:54,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:54,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:24:54,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338538110] [2021-06-05 05:24:54,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:24:54,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:54,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:24:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:24:54,424 INFO L87 Difference]: Start difference. First operand 3728 states and 14373 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:55,341 INFO L93 Difference]: Finished difference Result 4138 states and 15595 transitions. [2021-06-05 05:24:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:24:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:55,349 INFO L225 Difference]: With dead ends: 4138 [2021-06-05 05:24:55,349 INFO L226 Difference]: Without dead ends: 4120 [2021-06-05 05:24:55,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 820.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:24:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2021-06-05 05:24:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3729. [2021-06-05 05:24:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 3.8564914163090127) internal successors, (14377), 3728 states have internal predecessors, (14377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 14377 transitions. [2021-06-05 05:24:55,402 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 14377 transitions. Word has length 24 [2021-06-05 05:24:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:55,402 INFO L482 AbstractCegarLoop]: Abstraction has 3729 states and 14377 transitions. [2021-06-05 05:24:55,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 14377 transitions. [2021-06-05 05:24:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:55,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:55,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:55,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:55,608 INFO L430 AbstractCegarLoop]: === Iteration 442 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:55,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1076235720, now seen corresponding path program 279 times [2021-06-05 05:24:55,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:55,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408645754] [2021-06-05 05:24:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:55,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:55,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408645754] [2021-06-05 05:24:55,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408645754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:55,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598862737] [2021-06-05 05:24:55,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:55,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:24:55,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:55,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:24:55,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:55,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:24:55,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:55,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-06-05 05:24:55,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:56,017 INFO L628 ElimStorePlain]: treesize reduction 29, result has 53.2 percent of original size [2021-06-05 05:24:56,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:56,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:43 [2021-06-05 05:24:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:56,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598862737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:56,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:56,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:24:56,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405701558] [2021-06-05 05:24:56,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:24:56,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:56,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:24:56,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:24:56,075 INFO L87 Difference]: Start difference. First operand 3729 states and 14377 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:57,072 INFO L93 Difference]: Finished difference Result 4183 states and 15741 transitions. [2021-06-05 05:24:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:24:57,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:57,079 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 05:24:57,080 INFO L226 Difference]: Without dead ends: 4164 [2021-06-05 05:24:57,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 866.5ms TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:24:57,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-06-05 05:24:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 3733. [2021-06-05 05:24:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.8561093247588425) internal successors, (14391), 3732 states have internal predecessors, (14391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 14391 transitions. [2021-06-05 05:24:57,136 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 14391 transitions. Word has length 24 [2021-06-05 05:24:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:57,136 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 14391 transitions. [2021-06-05 05:24:57,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 14391 transitions. [2021-06-05 05:24:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:57,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:57,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:57,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable867 [2021-06-05 05:24:57,341 INFO L430 AbstractCegarLoop]: === Iteration 443 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:57,342 INFO L82 PathProgramCache]: Analyzing trace with hash 48085860, now seen corresponding path program 280 times [2021-06-05 05:24:57,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:57,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988299627] [2021-06-05 05:24:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:57,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:57,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988299627] [2021-06-05 05:24:57,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988299627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:57,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349800881] [2021-06-05 05:24:57,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:57,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:57,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:57,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:57,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:24:57,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:57,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:57,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:57,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:24:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:57,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349800881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:57,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:57,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:24:57,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279863648] [2021-06-05 05:24:57,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:24:57,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:24:57,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:24:57,667 INFO L87 Difference]: Start difference. First operand 3733 states and 14391 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:58,501 INFO L93 Difference]: Finished difference Result 4153 states and 15675 transitions. [2021-06-05 05:24:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:24:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:58,508 INFO L225 Difference]: With dead ends: 4153 [2021-06-05 05:24:58,508 INFO L226 Difference]: Without dead ends: 4144 [2021-06-05 05:24:58,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 690.1ms TimeCoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:24:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-05 05:24:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3736. [2021-06-05 05:24:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 3735 states have (on average 3.8556894243641233) internal successors, (14401), 3735 states have internal predecessors, (14401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 14401 transitions. [2021-06-05 05:24:58,563 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 14401 transitions. Word has length 24 [2021-06-05 05:24:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:58,563 INFO L482 AbstractCegarLoop]: Abstraction has 3736 states and 14401 transitions. [2021-06-05 05:24:58,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 14401 transitions. [2021-06-05 05:24:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:58,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:58,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:58,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-06-05 05:24:58,769 INFO L430 AbstractCegarLoop]: === Iteration 444 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:24:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:58,769 INFO L82 PathProgramCache]: Analyzing trace with hash 371672038, now seen corresponding path program 281 times [2021-06-05 05:24:58,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:58,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200355225] [2021-06-05 05:24:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:58,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200355225] [2021-06-05 05:24:58,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200355225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875328413] [2021-06-05 05:24:58,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:58,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:24:58,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:24:58,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:59,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:24:59,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:24:59,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:24:59,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:24:59,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:24:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:59,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875328413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:59,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:59,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:24:59,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501353323] [2021-06-05 05:24:59,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:24:59,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:59,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:24:59,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:24:59,100 INFO L87 Difference]: Start difference. First operand 3736 states and 14401 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:59,822 INFO L93 Difference]: Finished difference Result 4197 states and 15833 transitions. [2021-06-05 05:24:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:24:59,822 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:24:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:59,829 INFO L225 Difference]: With dead ends: 4197 [2021-06-05 05:24:59,829 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 05:24:59,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 631.0ms TimeCoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:24:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 05:24:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3731. [2021-06-05 05:24:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3730 states have (on average 3.8560321715817696) internal successors, (14383), 3730 states have internal predecessors, (14383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 14383 transitions. [2021-06-05 05:24:59,883 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 14383 transitions. Word has length 24 [2021-06-05 05:24:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:59,883 INFO L482 AbstractCegarLoop]: Abstraction has 3731 states and 14383 transitions. [2021-06-05 05:24:59,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 14383 transitions. [2021-06-05 05:24:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:24:59,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:59,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:00,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-06-05 05:25:00,089 INFO L430 AbstractCegarLoop]: === Iteration 445 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1629782282, now seen corresponding path program 282 times [2021-06-05 05:25:00,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:00,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929084742] [2021-06-05 05:25:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:00,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:00,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929084742] [2021-06-05 05:25:00,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929084742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:00,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863112331] [2021-06-05 05:25:00,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:00,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:25:00,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:00,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:00,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:00,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:00,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:00,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:00,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:00,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 05:25:00,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:25:00,496 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-06-05 05:25:00,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:00,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 05:25:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:00,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863112331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:00,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:00,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:25:00,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251768627] [2021-06-05 05:25:00,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:25:00,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:00,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:25:00,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:25:00,554 INFO L87 Difference]: Start difference. First operand 3731 states and 14383 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:01,639 INFO L93 Difference]: Finished difference Result 4236 states and 15905 transitions. [2021-06-05 05:25:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:25:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:01,647 INFO L225 Difference]: With dead ends: 4236 [2021-06-05 05:25:01,647 INFO L226 Difference]: Without dead ends: 4217 [2021-06-05 05:25:01,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 747.9ms TimeCoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:25:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2021-06-05 05:25:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 3734. [2021-06-05 05:25:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 3733 states have (on average 3.8558799892847575) internal successors, (14394), 3733 states have internal predecessors, (14394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 14394 transitions. [2021-06-05 05:25:01,705 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 14394 transitions. Word has length 24 [2021-06-05 05:25:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:01,706 INFO L482 AbstractCegarLoop]: Abstraction has 3734 states and 14394 transitions. [2021-06-05 05:25:01,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 14394 transitions. [2021-06-05 05:25:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:01,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:01,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:01,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:01,912 INFO L430 AbstractCegarLoop]: === Iteration 446 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:01,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1660127200, now seen corresponding path program 283 times [2021-06-05 05:25:01,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:01,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032605329] [2021-06-05 05:25:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:02,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032605329] [2021-06-05 05:25:02,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032605329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573350814] [2021-06-05 05:25:02,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:02,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:02,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:02,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:25:02,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:02,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:02,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:02,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:25:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:02,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573350814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:02,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:02,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:25:02,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633624526] [2021-06-05 05:25:02,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:02,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:02,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:02,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:02,344 INFO L87 Difference]: Start difference. First operand 3734 states and 14394 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:03,312 INFO L93 Difference]: Finished difference Result 4150 states and 15666 transitions. [2021-06-05 05:25:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:25:03,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:03,320 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 05:25:03,320 INFO L226 Difference]: Without dead ends: 4131 [2021-06-05 05:25:03,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 881.2ms TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:25:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-06-05 05:25:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3734. [2021-06-05 05:25:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 3733 states have (on average 3.8564157514063755) internal successors, (14396), 3733 states have internal predecessors, (14396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 14396 transitions. [2021-06-05 05:25:03,381 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 14396 transitions. Word has length 24 [2021-06-05 05:25:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:03,381 INFO L482 AbstractCegarLoop]: Abstraction has 3734 states and 14396 transitions. [2021-06-05 05:25:03,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 14396 transitions. [2021-06-05 05:25:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:03,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:03,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:03,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:03,587 INFO L430 AbstractCegarLoop]: === Iteration 447 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1836668632, now seen corresponding path program 284 times [2021-06-05 05:25:03,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:03,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102956627] [2021-06-05 05:25:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:03,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:03,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102956627] [2021-06-05 05:25:03,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102956627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:03,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094226446] [2021-06-05 05:25:03,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:03,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:03,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:03,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:03,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:03,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:03,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:25:03,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:03,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:03,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:03,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:25:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:04,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094226446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:04,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:04,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:04,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570789209] [2021-06-05 05:25:04,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:04,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:04,092 INFO L87 Difference]: Start difference. First operand 3734 states and 14396 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:04,999 INFO L93 Difference]: Finished difference Result 4069 states and 15416 transitions. [2021-06-05 05:25:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:25:04,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:05,006 INFO L225 Difference]: With dead ends: 4069 [2021-06-05 05:25:05,006 INFO L226 Difference]: Without dead ends: 4060 [2021-06-05 05:25:05,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 972.8ms TimeCoverageRelationStatistics Valid=356, Invalid=1536, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:25:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2021-06-05 05:25:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 3735. [2021-06-05 05:25:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 3734 states have (on average 3.85645420460632) internal successors, (14400), 3734 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 14400 transitions. [2021-06-05 05:25:05,063 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 14400 transitions. Word has length 24 [2021-06-05 05:25:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:05,063 INFO L482 AbstractCegarLoop]: Abstraction has 3735 states and 14400 transitions. [2021-06-05 05:25:05,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 14400 transitions. [2021-06-05 05:25:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:05,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:05,068 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:05,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:05,284 INFO L430 AbstractCegarLoop]: === Iteration 448 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:05,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1624560224, now seen corresponding path program 285 times [2021-06-05 05:25:05,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:05,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787670797] [2021-06-05 05:25:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:05,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:05,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787670797] [2021-06-05 05:25:05,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787670797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:05,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782267398] [2021-06-05 05:25:05,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:05,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:25:05,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:05,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:05,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:05,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:05,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:25:05,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:05,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:05,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:05,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 05:25:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:05,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782267398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:05,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:05,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:05,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219928295] [2021-06-05 05:25:05,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:05,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:05,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:05,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:05,708 INFO L87 Difference]: Start difference. First operand 3735 states and 14400 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:06,439 INFO L93 Difference]: Finished difference Result 4046 states and 15352 transitions. [2021-06-05 05:25:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:25:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:06,447 INFO L225 Difference]: With dead ends: 4046 [2021-06-05 05:25:06,447 INFO L226 Difference]: Without dead ends: 4036 [2021-06-05 05:25:06,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 725.2ms TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:25:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4036 states. [2021-06-05 05:25:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4036 to 3733. [2021-06-05 05:25:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.8563772775991425) internal successors, (14392), 3732 states have internal predecessors, (14392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 14392 transitions. [2021-06-05 05:25:06,516 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 14392 transitions. Word has length 24 [2021-06-05 05:25:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:06,517 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 14392 transitions. [2021-06-05 05:25:06,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 14392 transitions. [2021-06-05 05:25:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:06,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:06,523 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:06,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-06-05 05:25:06,723 INFO L430 AbstractCegarLoop]: === Iteration 449 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:06,723 INFO L82 PathProgramCache]: Analyzing trace with hash 23156128, now seen corresponding path program 286 times [2021-06-05 05:25:06,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:06,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140234541] [2021-06-05 05:25:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:06,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:06,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140234541] [2021-06-05 05:25:06,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140234541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:06,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129087668] [2021-06-05 05:25:06,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:06,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:06,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:06,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:06,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:07,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:25:07,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:07,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:07,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:07,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:25:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:07,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129087668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:07,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:07,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:25:07,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718657595] [2021-06-05 05:25:07,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:07,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:07,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:07,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:07,119 INFO L87 Difference]: Start difference. First operand 3733 states and 14392 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:07,611 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-06-05 05:25:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:08,332 INFO L93 Difference]: Finished difference Result 4228 states and 15916 transitions. [2021-06-05 05:25:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:25:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:08,340 INFO L225 Difference]: With dead ends: 4228 [2021-06-05 05:25:08,340 INFO L226 Difference]: Without dead ends: 4209 [2021-06-05 05:25:08,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 952.4ms TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:25:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-06-05 05:25:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 3735. [2021-06-05 05:25:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 3734 states have (on average 3.856186395286556) internal successors, (14399), 3734 states have internal predecessors, (14399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 14399 transitions. [2021-06-05 05:25:08,399 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 14399 transitions. Word has length 24 [2021-06-05 05:25:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:08,399 INFO L482 AbstractCegarLoop]: Abstraction has 3735 states and 14399 transitions. [2021-06-05 05:25:08,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 14399 transitions. [2021-06-05 05:25:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:08,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:08,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:08,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 05:25:08,605 INFO L430 AbstractCegarLoop]: === Iteration 450 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:08,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1004993732, now seen corresponding path program 287 times [2021-06-05 05:25:08,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:08,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438267813] [2021-06-05 05:25:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:08,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:08,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438267813] [2021-06-05 05:25:08,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438267813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:08,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792822915] [2021-06-05 05:25:08,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:08,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:25:08,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:08,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:08,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:08,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:25:08,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:08,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:08,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:08,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:25:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:08,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792822915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:08,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:08,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:25:08,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156399705] [2021-06-05 05:25:08,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:25:08,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:25:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:25:08,926 INFO L87 Difference]: Start difference. First operand 3735 states and 14399 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:09,835 INFO L93 Difference]: Finished difference Result 4218 states and 15907 transitions. [2021-06-05 05:25:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:25:09,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:09,842 INFO L225 Difference]: With dead ends: 4218 [2021-06-05 05:25:09,842 INFO L226 Difference]: Without dead ends: 4208 [2021-06-05 05:25:09,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 673.8ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:25:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-06-05 05:25:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3738. [2021-06-05 05:25:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 3.8563018464008563) internal successors, (14411), 3737 states have internal predecessors, (14411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 14411 transitions. [2021-06-05 05:25:09,896 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 14411 transitions. Word has length 24 [2021-06-05 05:25:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:09,896 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 14411 transitions. [2021-06-05 05:25:09,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 14411 transitions. [2021-06-05 05:25:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:09,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:09,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:10,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 05:25:10,109 INFO L430 AbstractCegarLoop]: === Iteration 451 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash -681407554, now seen corresponding path program 288 times [2021-06-05 05:25:10,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:10,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962834350] [2021-06-05 05:25:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:10,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:10,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962834350] [2021-06-05 05:25:10,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962834350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:10,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093057632] [2021-06-05 05:25:10,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:10,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:25:10,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:10,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:10,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:10,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:10,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:25:10,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:10,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:10,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:10,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:25:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:10,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093057632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:10,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:10,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:10,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355347742] [2021-06-05 05:25:10,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:10,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:10,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:10,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:10,479 INFO L87 Difference]: Start difference. First operand 3738 states and 14411 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:11,523 INFO L93 Difference]: Finished difference Result 4183 states and 15745 transitions. [2021-06-05 05:25:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:25:11,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:11,530 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 05:25:11,530 INFO L226 Difference]: Without dead ends: 4160 [2021-06-05 05:25:11,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 855.4ms TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:25:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4160 states. [2021-06-05 05:25:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4160 to 3741. [2021-06-05 05:25:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3740 states have (on average 3.8561497326203207) internal successors, (14422), 3740 states have internal predecessors, (14422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 14422 transitions. [2021-06-05 05:25:11,584 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 14422 transitions. Word has length 24 [2021-06-05 05:25:11,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:11,584 INFO L482 AbstractCegarLoop]: Abstraction has 3741 states and 14422 transitions. [2021-06-05 05:25:11,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 14422 transitions. [2021-06-05 05:25:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:11,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:11,590 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:11,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:11,790 INFO L430 AbstractCegarLoop]: === Iteration 452 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:11,790 INFO L82 PathProgramCache]: Analyzing trace with hash 642602832, now seen corresponding path program 289 times [2021-06-05 05:25:11,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:11,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864622166] [2021-06-05 05:25:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:11,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:11,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864622166] [2021-06-05 05:25:11,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864622166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:11,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797307124] [2021-06-05 05:25:11,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:12,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:25:12,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:12,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:12,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:12,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:25:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:12,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797307124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:12,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:12,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:25:12,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153291647] [2021-06-05 05:25:12,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:12,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:12,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:12,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:12,124 INFO L87 Difference]: Start difference. First operand 3741 states and 14422 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:12,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:12,992 INFO L93 Difference]: Finished difference Result 4161 states and 15695 transitions. [2021-06-05 05:25:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:25:12,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:13,000 INFO L225 Difference]: With dead ends: 4161 [2021-06-05 05:25:13,000 INFO L226 Difference]: Without dead ends: 4142 [2021-06-05 05:25:13,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 694.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:25:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2021-06-05 05:25:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 3743. [2021-06-05 05:25:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3742 states have (on average 3.8559593800106895) internal successors, (14429), 3742 states have internal predecessors, (14429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 14429 transitions. [2021-06-05 05:25:13,059 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 14429 transitions. Word has length 24 [2021-06-05 05:25:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:13,059 INFO L482 AbstractCegarLoop]: Abstraction has 3743 states and 14429 transitions. [2021-06-05 05:25:13,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 14429 transitions. [2021-06-05 05:25:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:13,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:13,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:13,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-06-05 05:25:13,280 INFO L430 AbstractCegarLoop]: === Iteration 453 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:13,280 INFO L82 PathProgramCache]: Analyzing trace with hash 860027718, now seen corresponding path program 290 times [2021-06-05 05:25:13,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:13,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626158650] [2021-06-05 05:25:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:13,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:13,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626158650] [2021-06-05 05:25:13,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626158650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:13,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447259605] [2021-06-05 05:25:13,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:13,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:13,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:13,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:13,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:13,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:25:13,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:13,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:13,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:13,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:25:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:13,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447259605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:13,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:13,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:13,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377135087] [2021-06-05 05:25:13,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:13,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:13,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:13,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:13,748 INFO L87 Difference]: Start difference. First operand 3743 states and 14429 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:14,875 INFO L93 Difference]: Finished difference Result 4157 states and 15670 transitions. [2021-06-05 05:25:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:25:14,875 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:14,882 INFO L225 Difference]: With dead ends: 4157 [2021-06-05 05:25:14,883 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 05:25:14,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 957.6ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:25:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 05:25:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3744. [2021-06-05 05:25:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3743 states have (on average 3.855997862676997) internal successors, (14433), 3743 states have internal predecessors, (14433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 14433 transitions. [2021-06-05 05:25:14,941 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 14433 transitions. Word has length 24 [2021-06-05 05:25:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:14,942 INFO L482 AbstractCegarLoop]: Abstraction has 3744 states and 14433 transitions. [2021-06-05 05:25:14,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 14433 transitions. [2021-06-05 05:25:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:14,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:14,947 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:15,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable888,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:15,148 INFO L430 AbstractCegarLoop]: === Iteration 454 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:15,148 INFO L82 PathProgramCache]: Analyzing trace with hash 26289278, now seen corresponding path program 291 times [2021-06-05 05:25:15,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:15,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470128093] [2021-06-05 05:25:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:15,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:15,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470128093] [2021-06-05 05:25:15,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470128093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:15,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998599149] [2021-06-05 05:25:15,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:15,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:25:15,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:15,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:15,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:15,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:15,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:25:15,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:15,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:15,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:15,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:25:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:15,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998599149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:15,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:15,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:15,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563251212] [2021-06-05 05:25:15,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:15,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:15,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:15,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:15,540 INFO L87 Difference]: Start difference. First operand 3744 states and 14433 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:16,454 INFO L93 Difference]: Finished difference Result 4163 states and 15652 transitions. [2021-06-05 05:25:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:25:16,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:16,462 INFO L225 Difference]: With dead ends: 4163 [2021-06-05 05:25:16,462 INFO L226 Difference]: Without dead ends: 4144 [2021-06-05 05:25:16,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 813.6ms TimeCoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:25:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-05 05:25:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3747. [2021-06-05 05:25:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 3.856380138814736) internal successors, (14446), 3746 states have internal predecessors, (14446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 14446 transitions. [2021-06-05 05:25:16,518 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 14446 transitions. Word has length 24 [2021-06-05 05:25:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:16,518 INFO L482 AbstractCegarLoop]: Abstraction has 3747 states and 14446 transitions. [2021-06-05 05:25:16,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 14446 transitions. [2021-06-05 05:25:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:16,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:16,523 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:16,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:16,724 INFO L430 AbstractCegarLoop]: === Iteration 455 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:16,724 INFO L82 PathProgramCache]: Analyzing trace with hash 808123078, now seen corresponding path program 292 times [2021-06-05 05:25:16,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:16,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997169984] [2021-06-05 05:25:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:16,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:16,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997169984] [2021-06-05 05:25:16,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997169984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:16,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847149776] [2021-06-05 05:25:16,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:16,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:16,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:16,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:16,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:25:16,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:16,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:16,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:16,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 05:25:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:17,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847149776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:17,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:17,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:25:17,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105019422] [2021-06-05 05:25:17,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:25:17,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:17,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:25:17,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:25:17,031 INFO L87 Difference]: Start difference. First operand 3747 states and 14446 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:17,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:17,635 INFO L93 Difference]: Finished difference Result 4089 states and 15475 transitions. [2021-06-05 05:25:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:25:17,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:17,643 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 05:25:17,643 INFO L226 Difference]: Without dead ends: 4077 [2021-06-05 05:25:17,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:25:17,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2021-06-05 05:25:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 3742. [2021-06-05 05:25:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 3.8561881849772788) internal successors, (14426), 3741 states have internal predecessors, (14426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 14426 transitions. [2021-06-05 05:25:17,698 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 14426 transitions. Word has length 24 [2021-06-05 05:25:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:17,698 INFO L482 AbstractCegarLoop]: Abstraction has 3742 states and 14426 transitions. [2021-06-05 05:25:17,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 14426 transitions. [2021-06-05 05:25:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:17,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:17,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:17,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-06-05 05:25:17,904 INFO L430 AbstractCegarLoop]: === Iteration 456 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:17,904 INFO L82 PathProgramCache]: Analyzing trace with hash -806336122, now seen corresponding path program 293 times [2021-06-05 05:25:17,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:17,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357733783] [2021-06-05 05:25:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:18,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:18,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357733783] [2021-06-05 05:25:18,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357733783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:18,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254873384] [2021-06-05 05:25:18,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:18,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:25:18,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:18,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:18,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:25:18,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:18,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:18,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:18,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:25:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:18,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254873384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:18,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:18,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:25:18,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401189778] [2021-06-05 05:25:18,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:25:18,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:18,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:25:18,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:25:18,252 INFO L87 Difference]: Start difference. First operand 3742 states and 14426 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:19,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:19,093 INFO L93 Difference]: Finished difference Result 4166 states and 15743 transitions. [2021-06-05 05:25:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:25:19,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:19,101 INFO L225 Difference]: With dead ends: 4166 [2021-06-05 05:25:19,101 INFO L226 Difference]: Without dead ends: 4157 [2021-06-05 05:25:19,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 655.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:25:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2021-06-05 05:25:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 3742. [2021-06-05 05:25:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 3.8561881849772788) internal successors, (14426), 3741 states have internal predecessors, (14426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 14426 transitions. [2021-06-05 05:25:19,155 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 14426 transitions. Word has length 24 [2021-06-05 05:25:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:19,155 INFO L482 AbstractCegarLoop]: Abstraction has 3742 states and 14426 transitions. [2021-06-05 05:25:19,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 14426 transitions. [2021-06-05 05:25:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:19,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:19,160 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:19,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 05:25:19,361 INFO L430 AbstractCegarLoop]: === Iteration 457 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1202994178, now seen corresponding path program 294 times [2021-06-05 05:25:19,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:19,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921950250] [2021-06-05 05:25:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:19,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:19,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921950250] [2021-06-05 05:25:19,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921950250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:19,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619938009] [2021-06-05 05:25:19,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:19,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:25:19,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:19,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:19,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:19,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:19,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:25:19,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:19,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:19,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:19,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:25:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:19,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619938009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:19,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:19,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:19,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312569117] [2021-06-05 05:25:19,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:19,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:19,758 INFO L87 Difference]: Start difference. First operand 3742 states and 14426 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:20,703 INFO L93 Difference]: Finished difference Result 4022 states and 15270 transitions. [2021-06-05 05:25:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:25:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:20,711 INFO L225 Difference]: With dead ends: 4022 [2021-06-05 05:25:20,711 INFO L226 Difference]: Without dead ends: 4011 [2021-06-05 05:25:20,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 844.4ms TimeCoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:25:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4011 states. [2021-06-05 05:25:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4011 to 3740. [2021-06-05 05:25:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3740 states, 3739 states have (on average 3.855843808504948) internal successors, (14417), 3739 states have internal predecessors, (14417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3740 states to 3740 states and 14417 transitions. [2021-06-05 05:25:20,767 INFO L78 Accepts]: Start accepts. Automaton has 3740 states and 14417 transitions. Word has length 24 [2021-06-05 05:25:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:20,767 INFO L482 AbstractCegarLoop]: Abstraction has 3740 states and 14417 transitions. [2021-06-05 05:25:20,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3740 states and 14417 transitions. [2021-06-05 05:25:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:20,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:20,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:20,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable896,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:20,973 INFO L430 AbstractCegarLoop]: === Iteration 458 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash -509259306, now seen corresponding path program 295 times [2021-06-05 05:25:20,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:20,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046842674] [2021-06-05 05:25:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:21,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:21,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046842674] [2021-06-05 05:25:21,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046842674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:21,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545327985] [2021-06-05 05:25:21,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:21,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:21,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:25:21,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:21,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:21,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:21,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:25:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:21,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545327985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:21,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:21,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:25:21,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020221447] [2021-06-05 05:25:21,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:25:21,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:21,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:25:21,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:25:21,295 INFO L87 Difference]: Start difference. First operand 3740 states and 14417 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:22,098 INFO L93 Difference]: Finished difference Result 4067 states and 15421 transitions. [2021-06-05 05:25:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:25:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:22,105 INFO L225 Difference]: With dead ends: 4067 [2021-06-05 05:25:22,105 INFO L226 Difference]: Without dead ends: 4058 [2021-06-05 05:25:22,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:25:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-06-05 05:25:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 3741. [2021-06-05 05:25:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3740 states have (on average 3.8558823529411765) internal successors, (14421), 3740 states have internal predecessors, (14421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 14421 transitions. [2021-06-05 05:25:22,186 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 14421 transitions. Word has length 24 [2021-06-05 05:25:22,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:22,186 INFO L482 AbstractCegarLoop]: Abstraction has 3741 states and 14421 transitions. [2021-06-05 05:25:22,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 14421 transitions. [2021-06-05 05:25:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:22,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:22,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:22,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable898 [2021-06-05 05:25:22,392 INFO L430 AbstractCegarLoop]: === Iteration 459 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1994846816, now seen corresponding path program 296 times [2021-06-05 05:25:22,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:22,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811047883] [2021-06-05 05:25:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:22,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811047883] [2021-06-05 05:25:22,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811047883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:22,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83892253] [2021-06-05 05:25:22,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:22,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:22,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:22,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:22,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:22,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:25:22,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:22,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:22,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:22,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 05:25:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:22,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83892253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:22,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:22,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:22,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888301195] [2021-06-05 05:25:22,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:22,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:22,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:22,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:22,766 INFO L87 Difference]: Start difference. First operand 3741 states and 14421 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:23,596 INFO L93 Difference]: Finished difference Result 4049 states and 15363 transitions. [2021-06-05 05:25:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:25:23,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:23,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:23,604 INFO L225 Difference]: With dead ends: 4049 [2021-06-05 05:25:23,604 INFO L226 Difference]: Without dead ends: 4039 [2021-06-05 05:25:23,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 696.4ms TimeCoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:25:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2021-06-05 05:25:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 3740. [2021-06-05 05:25:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3740 states, 3739 states have (on average 3.855843808504948) internal successors, (14417), 3739 states have internal predecessors, (14417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3740 states to 3740 states and 14417 transitions. [2021-06-05 05:25:23,659 INFO L78 Accepts]: Start accepts. Automaton has 3740 states and 14417 transitions. Word has length 24 [2021-06-05 05:25:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:23,659 INFO L482 AbstractCegarLoop]: Abstraction has 3740 states and 14417 transitions. [2021-06-05 05:25:23,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3740 states and 14417 transitions. [2021-06-05 05:25:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:23,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:23,664 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:23,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable899 [2021-06-05 05:25:23,865 INFO L430 AbstractCegarLoop]: === Iteration 460 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash -573231136, now seen corresponding path program 297 times [2021-06-05 05:25:23,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:23,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161589338] [2021-06-05 05:25:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:24,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:24,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161589338] [2021-06-05 05:25:24,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161589338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:24,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728303823] [2021-06-05 05:25:24,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:24,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:25:24,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:24,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:24,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:24,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:24,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 05:25:24,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:24,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:24,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:24,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 05:25:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:24,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728303823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:24,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:24,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:25:24,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986602326] [2021-06-05 05:25:24,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:25:24,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:24,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:25:24,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:25:24,357 INFO L87 Difference]: Start difference. First operand 3740 states and 14417 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:25,517 INFO L93 Difference]: Finished difference Result 4108 states and 15508 transitions. [2021-06-05 05:25:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:25:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:25,525 INFO L225 Difference]: With dead ends: 4108 [2021-06-05 05:25:25,525 INFO L226 Difference]: Without dead ends: 4097 [2021-06-05 05:25:25,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 996.9ms TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:25:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-06-05 05:25:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3744. [2021-06-05 05:25:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3743 states have (on average 3.8565321934277317) internal successors, (14435), 3743 states have internal predecessors, (14435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 14435 transitions. [2021-06-05 05:25:25,582 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 14435 transitions. Word has length 24 [2021-06-05 05:25:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:25,583 INFO L482 AbstractCegarLoop]: Abstraction has 3744 states and 14435 transitions. [2021-06-05 05:25:25,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 14435 transitions. [2021-06-05 05:25:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:25,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:25,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:25,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:25,789 INFO L430 AbstractCegarLoop]: === Iteration 461 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:25,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:25,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1112512986, now seen corresponding path program 298 times [2021-06-05 05:25:25,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:25,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295513468] [2021-06-05 05:25:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:25,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:25,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295513468] [2021-06-05 05:25:25,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295513468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:25,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552876903] [2021-06-05 05:25:25,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:25,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:25,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:26,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:25:26,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:26,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:26,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:26,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:25:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:26,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552876903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:26,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:26,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:25:26,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860767539] [2021-06-05 05:25:26,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:25:26,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:26,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:25:26,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:25:26,122 INFO L87 Difference]: Start difference. First operand 3744 states and 14435 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:26,790 INFO L93 Difference]: Finished difference Result 4014 states and 15254 transitions. [2021-06-05 05:25:26,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:25:26,790 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:26,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:26,797 INFO L225 Difference]: With dead ends: 4014 [2021-06-05 05:25:26,797 INFO L226 Difference]: Without dead ends: 4003 [2021-06-05 05:25:26,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:25:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2021-06-05 05:25:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3744. [2021-06-05 05:25:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3743 states have (on average 3.8557306973016297) internal successors, (14432), 3743 states have internal predecessors, (14432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 14432 transitions. [2021-06-05 05:25:26,852 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 14432 transitions. Word has length 24 [2021-06-05 05:25:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:26,852 INFO L482 AbstractCegarLoop]: Abstraction has 3744 states and 14432 transitions. [2021-06-05 05:25:26,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 14432 transitions. [2021-06-05 05:25:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:26,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:26,857 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:27,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable906,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:27,058 INFO L430 AbstractCegarLoop]: === Iteration 462 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash 406183312, now seen corresponding path program 299 times [2021-06-05 05:25:27,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:27,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779065268] [2021-06-05 05:25:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:27,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:27,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779065268] [2021-06-05 05:25:27,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779065268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:27,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697802233] [2021-06-05 05:25:27,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:27,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:25:27,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:27,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:27,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:25:27,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:27,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:27,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:27,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 05:25:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:27,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697802233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:27,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:27,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:25:27,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248872531] [2021-06-05 05:25:27,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:25:27,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:27,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:25:27,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:25:27,411 INFO L87 Difference]: Start difference. First operand 3744 states and 14432 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:28,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:28,110 INFO L93 Difference]: Finished difference Result 4062 states and 15411 transitions. [2021-06-05 05:25:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:25:28,110 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:28,117 INFO L225 Difference]: With dead ends: 4062 [2021-06-05 05:25:28,117 INFO L226 Difference]: Without dead ends: 4052 [2021-06-05 05:25:28,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 586.9ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:25:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-06-05 05:25:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 3741. [2021-06-05 05:25:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3740 states have (on average 3.8564171122994653) internal successors, (14423), 3740 states have internal predecessors, (14423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 14423 transitions. [2021-06-05 05:25:28,172 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 14423 transitions. Word has length 24 [2021-06-05 05:25:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:28,172 INFO L482 AbstractCegarLoop]: Abstraction has 3741 states and 14423 transitions. [2021-06-05 05:25:28,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 14423 transitions. [2021-06-05 05:25:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:28,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:28,178 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:28,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:28,378 INFO L430 AbstractCegarLoop]: === Iteration 463 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:28,378 INFO L82 PathProgramCache]: Analyzing trace with hash 937779642, now seen corresponding path program 300 times [2021-06-05 05:25:28,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:28,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008836830] [2021-06-05 05:25:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:28,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:28,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008836830] [2021-06-05 05:25:28,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008836830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:28,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639383365] [2021-06-05 05:25:28,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:28,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:25:28,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:28,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:25:28,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:28,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:28,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:28,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 05:25:28,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:28,852 INFO L628 ElimStorePlain]: treesize reduction 46, result has 43.9 percent of original size [2021-06-05 05:25:28,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:28,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 05:25:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:28,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639383365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:28,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:28,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 05:25:28,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531424300] [2021-06-05 05:25:28,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:28,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:28,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:28,928 INFO L87 Difference]: Start difference. First operand 3741 states and 14423 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:31,029 INFO L93 Difference]: Finished difference Result 4390 states and 16422 transitions. [2021-06-05 05:25:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:25:31,029 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:31,037 INFO L225 Difference]: With dead ends: 4390 [2021-06-05 05:25:31,037 INFO L226 Difference]: Without dead ends: 4372 [2021-06-05 05:25:31,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1851.6ms TimeCoverageRelationStatistics Valid=562, Invalid=2300, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:25:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2021-06-05 05:25:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 3743. [2021-06-05 05:25:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3742 states have (on average 3.8559593800106895) internal successors, (14429), 3742 states have internal predecessors, (14429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 14429 transitions. [2021-06-05 05:25:31,091 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 14429 transitions. Word has length 24 [2021-06-05 05:25:31,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:31,092 INFO L482 AbstractCegarLoop]: Abstraction has 3743 states and 14429 transitions. [2021-06-05 05:25:31,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 14429 transitions. [2021-06-05 05:25:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:31,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:31,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:31,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable908 [2021-06-05 05:25:31,297 INFO L430 AbstractCegarLoop]: === Iteration 464 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash -570302416, now seen corresponding path program 301 times [2021-06-05 05:25:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:31,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536900601] [2021-06-05 05:25:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:31,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:31,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536900601] [2021-06-05 05:25:31,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536900601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:31,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989137360] [2021-06-05 05:25:31,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:31,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:25:31,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:31,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:31,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:31,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:25:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:31,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989137360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:31,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:31,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:25:31,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009401924] [2021-06-05 05:25:31,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:31,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:31,653 INFO L87 Difference]: Start difference. First operand 3743 states and 14429 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:33,157 INFO L93 Difference]: Finished difference Result 4321 states and 16193 transitions. [2021-06-05 05:25:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:25:33,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:33,165 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 05:25:33,165 INFO L226 Difference]: Without dead ends: 4302 [2021-06-05 05:25:33,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1127.8ms TimeCoverageRelationStatistics Valid=365, Invalid=2085, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:25:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-06-05 05:25:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3744. [2021-06-05 05:25:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3743 states have (on average 3.855997862676997) internal successors, (14433), 3743 states have internal predecessors, (14433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 14433 transitions. [2021-06-05 05:25:33,221 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 14433 transitions. Word has length 24 [2021-06-05 05:25:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:33,221 INFO L482 AbstractCegarLoop]: Abstraction has 3744 states and 14433 transitions. [2021-06-05 05:25:33,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 14433 transitions. [2021-06-05 05:25:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:33,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:33,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:33,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:33,427 INFO L430 AbstractCegarLoop]: === Iteration 465 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:33,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1189399664, now seen corresponding path program 302 times [2021-06-05 05:25:33,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:33,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081753110] [2021-06-05 05:25:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:33,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:33,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081753110] [2021-06-05 05:25:33,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081753110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:33,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207888803] [2021-06-05 05:25:33,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:33,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:33,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:33,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:33,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:33,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:25:33,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:33,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:33,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:33,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:25:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:33,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207888803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:33,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:33,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:33,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539723124] [2021-06-05 05:25:33,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:33,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:33,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:33,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:33,829 INFO L87 Difference]: Start difference. First operand 3744 states and 14433 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:34,109 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 05:25:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:35,304 INFO L93 Difference]: Finished difference Result 4225 states and 15902 transitions. [2021-06-05 05:25:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:25:35,305 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:35,312 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 05:25:35,312 INFO L226 Difference]: Without dead ends: 4216 [2021-06-05 05:25:35,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1221.1ms TimeCoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:25:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4216 states. [2021-06-05 05:25:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4216 to 3747. [2021-06-05 05:25:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 3.8555792845702084) internal successors, (14443), 3746 states have internal predecessors, (14443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 14443 transitions. [2021-06-05 05:25:35,369 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 14443 transitions. Word has length 24 [2021-06-05 05:25:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:35,369 INFO L482 AbstractCegarLoop]: Abstraction has 3747 states and 14443 transitions. [2021-06-05 05:25:35,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 14443 transitions. [2021-06-05 05:25:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:35,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:35,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:35,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:35,575 INFO L430 AbstractCegarLoop]: === Iteration 466 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash 355661224, now seen corresponding path program 303 times [2021-06-05 05:25:35,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:35,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808853052] [2021-06-05 05:25:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:35,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:35,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808853052] [2021-06-05 05:25:35,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808853052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:35,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031138989] [2021-06-05 05:25:35,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:35,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:25:35,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:35,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:35,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:35,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:35,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:25:35,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:35,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:35,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:35,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 05:25:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:35,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031138989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:35,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:35,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:35,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739040081] [2021-06-05 05:25:35,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:35,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:35,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:35,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:35,948 INFO L87 Difference]: Start difference. First operand 3747 states and 14443 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:37,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:37,103 INFO L93 Difference]: Finished difference Result 4146 states and 15676 transitions. [2021-06-05 05:25:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:25:37,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:37,111 INFO L225 Difference]: With dead ends: 4146 [2021-06-05 05:25:37,111 INFO L226 Difference]: Without dead ends: 4136 [2021-06-05 05:25:37,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 921.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:25:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2021-06-05 05:25:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 3746. [2021-06-05 05:25:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3745 states have (on average 3.8555407209612818) internal successors, (14439), 3745 states have internal predecessors, (14439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 14439 transitions. [2021-06-05 05:25:37,166 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 14439 transitions. Word has length 24 [2021-06-05 05:25:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:37,166 INFO L482 AbstractCegarLoop]: Abstraction has 3746 states and 14439 transitions. [2021-06-05 05:25:37,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 14439 transitions. [2021-06-05 05:25:37,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:37,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:37,172 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:37,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-06-05 05:25:37,388 INFO L430 AbstractCegarLoop]: === Iteration 467 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash 828448240, now seen corresponding path program 304 times [2021-06-05 05:25:37,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:37,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972940838] [2021-06-05 05:25:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:37,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:37,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972940838] [2021-06-05 05:25:37,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972940838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:37,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872266373] [2021-06-05 05:25:37,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:37,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:37,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:37,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:37,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:37,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:25:37,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:37,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:37,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:37,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:25:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:37,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872266373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:37,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:37,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:25:37,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16423855] [2021-06-05 05:25:37,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:37,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:37,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:37,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:37,721 INFO L87 Difference]: Start difference. First operand 3746 states and 14439 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:39,083 INFO L93 Difference]: Finished difference Result 4259 states and 16006 transitions. [2021-06-05 05:25:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:25:39,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:39,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:39,091 INFO L225 Difference]: With dead ends: 4259 [2021-06-05 05:25:39,091 INFO L226 Difference]: Without dead ends: 4240 [2021-06-05 05:25:39,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1016.5ms TimeCoverageRelationStatistics Valid=344, Invalid=1912, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:25:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-06-05 05:25:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3741. [2021-06-05 05:25:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3740 states have (on average 3.8564171122994653) internal successors, (14423), 3740 states have internal predecessors, (14423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 14423 transitions. [2021-06-05 05:25:39,149 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 14423 transitions. Word has length 24 [2021-06-05 05:25:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:39,149 INFO L482 AbstractCegarLoop]: Abstraction has 3741 states and 14423 transitions. [2021-06-05 05:25:39,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:39,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 14423 transitions. [2021-06-05 05:25:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:39,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:39,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:39,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-05 05:25:39,370 INFO L430 AbstractCegarLoop]: === Iteration 468 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:39,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:39,370 INFO L82 PathProgramCache]: Analyzing trace with hash -413253820, now seen corresponding path program 47 times [2021-06-05 05:25:39,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:39,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170641293] [2021-06-05 05:25:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:39,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170641293] [2021-06-05 05:25:39,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170641293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411218382] [2021-06-05 05:25:39,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:39,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:25:39,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:39,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:39,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:39,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:25:39,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:25:39,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:39,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:39,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:39,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:25:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:39,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411218382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:39,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:39,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:25:39,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940395116] [2021-06-05 05:25:39,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:25:39,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:39,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:25:39,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:25:39,806 INFO L87 Difference]: Start difference. First operand 3741 states and 14423 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:41,089 INFO L93 Difference]: Finished difference Result 4233 states and 15910 transitions. [2021-06-05 05:25:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:25:41,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:41,097 INFO L225 Difference]: With dead ends: 4233 [2021-06-05 05:25:41,097 INFO L226 Difference]: Without dead ends: 4224 [2021-06-05 05:25:41,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 985.5ms TimeCoverageRelationStatistics Valid=349, Invalid=2101, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:25:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2021-06-05 05:25:41,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 3744. [2021-06-05 05:25:41,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3743 states have (on average 3.855997862676997) internal successors, (14433), 3743 states have internal predecessors, (14433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 14433 transitions. [2021-06-05 05:25:41,151 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 14433 transitions. Word has length 24 [2021-06-05 05:25:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:41,152 INFO L482 AbstractCegarLoop]: Abstraction has 3744 states and 14433 transitions. [2021-06-05 05:25:41,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 14433 transitions. [2021-06-05 05:25:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:41,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:41,157 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:41,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable922 [2021-06-05 05:25:41,357 INFO L430 AbstractCegarLoop]: === Iteration 469 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:41,358 INFO L82 PathProgramCache]: Analyzing trace with hash -622791200, now seen corresponding path program 48 times [2021-06-05 05:25:41,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:41,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819269130] [2021-06-05 05:25:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:41,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:41,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819269130] [2021-06-05 05:25:41,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819269130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:41,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221596562] [2021-06-05 05:25:41,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:41,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:25:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:41,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:41,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:41,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:25:41,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:41,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 05:25:41,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:25:41,769 INFO L628 ElimStorePlain]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 05:25:41,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:41,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 05:25:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:41,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221596562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:41,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:41,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:25:41,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784385816] [2021-06-05 05:25:41,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:25:41,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:25:41,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:25:41,833 INFO L87 Difference]: Start difference. First operand 3744 states and 14433 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:43,240 INFO L93 Difference]: Finished difference Result 4334 states and 16206 transitions. [2021-06-05 05:25:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:25:43,240 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:43,247 INFO L225 Difference]: With dead ends: 4334 [2021-06-05 05:25:43,248 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 05:25:43,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1024.7ms TimeCoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:25:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 05:25:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3747. [2021-06-05 05:25:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 3.8555792845702084) internal successors, (14443), 3746 states have internal predecessors, (14443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 14443 transitions. [2021-06-05 05:25:43,303 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 14443 transitions. Word has length 24 [2021-06-05 05:25:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:43,303 INFO L482 AbstractCegarLoop]: Abstraction has 3747 states and 14443 transitions. [2021-06-05 05:25:43,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 14443 transitions. [2021-06-05 05:25:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:43,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:43,309 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:43,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:43,509 INFO L430 AbstractCegarLoop]: === Iteration 470 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:43,509 INFO L82 PathProgramCache]: Analyzing trace with hash 584076952, now seen corresponding path program 49 times [2021-06-05 05:25:43,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:43,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544065409] [2021-06-05 05:25:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:43,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544065409] [2021-06-05 05:25:43,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544065409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116079158] [2021-06-05 05:25:43,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:25:43,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:43,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:25:43,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:43,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:43,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:43,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:25:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:43,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116079158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:43,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:43,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:25:43,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496045810] [2021-06-05 05:25:43,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:25:43,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:25:43,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:25:43,828 INFO L87 Difference]: Start difference. First operand 3747 states and 14443 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:45,213 INFO L93 Difference]: Finished difference Result 4246 states and 15966 transitions. [2021-06-05 05:25:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:25:45,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:25:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:45,220 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 05:25:45,221 INFO L226 Difference]: Without dead ends: 4227 [2021-06-05 05:25:45,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1020.7ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:25:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-06-05 05:25:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 3744. [2021-06-05 05:25:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3743 states have (on average 3.8565321934277317) internal successors, (14435), 3743 states have internal predecessors, (14435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 14435 transitions. [2021-06-05 05:25:45,275 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 14435 transitions. Word has length 24 [2021-06-05 05:25:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:45,275 INFO L482 AbstractCegarLoop]: Abstraction has 3744 states and 14435 transitions. [2021-06-05 05:25:45,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 14435 transitions. [2021-06-05 05:25:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:25:45,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:45,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:25:45,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:45,481 INFO L430 AbstractCegarLoop]: === Iteration 471 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 05:25:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:45,482 INFO L82 PathProgramCache]: Analyzing trace with hash 77730686, now seen corresponding path program 50 times [2021-06-05 05:25:45,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:45,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740815706] [2021-06-05 05:25:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:45,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:45,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740815706] [2021-06-05 05:25:45,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740815706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:45,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759467079] [2021-06-05 05:25:45,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:45,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:45,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:25:45,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:45,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:45,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:25:45,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:25:45,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:25:45,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:25:45,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 05:25:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:45,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759467079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:45,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:45,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 05:25:45,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657535028] [2021-06-05 05:25:45,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:25:45,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:25:45,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:25:45,875 INFO L87 Difference]: Start difference. First operand 3744 states and 14435 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 05:25:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:25:46,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:46,922 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:25:46,924 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:25:46,925 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:25:46,925 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:25:46 BasicIcfg [2021-06-05 05:25:46,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:25:46,926 INFO L168 Benchmark]: Toolchain (without parser) took 823362.20 ms. Allocated memory was 379.6 MB in the beginning and 1.1 GB in the end (delta: 763.4 MB). Free memory was 358.6 MB in the beginning and 635.1 MB in the end (delta: -276.5 MB). Peak memory consumption was 489.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:25:46,926 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 379.6 MB. Free memory is still 359.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:25:46,926 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.17 ms. Allocated memory is still 379.6 MB. Free memory was 358.6 MB in the beginning and 357.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:25:46,926 INFO L168 Benchmark]: Boogie Preprocessor took 12.73 ms. Allocated memory is still 379.6 MB. Free memory was 357.1 MB in the beginning and 356.1 MB in the end (delta: 981.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:25:46,926 INFO L168 Benchmark]: RCFGBuilder took 202.72 ms. Allocated memory is still 379.6 MB. Free memory was 356.1 MB in the beginning and 340.8 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 05:25:46,926 INFO L168 Benchmark]: TraceAbstraction took 823121.83 ms. Allocated memory was 379.6 MB in the beginning and 1.1 GB in the end (delta: 763.4 MB). Free memory was 340.3 MB in the beginning and 635.1 MB in the end (delta: -294.8 MB). Peak memory consumption was 472.3 MB. Max. memory is 16.0 GB. [2021-06-05 05:25:46,926 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 379.6 MB. Free memory is still 359.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.17 ms. Allocated memory is still 379.6 MB. Free memory was 358.6 MB in the beginning and 357.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.73 ms. Allocated memory is still 379.6 MB. Free memory was 357.1 MB in the beginning and 356.1 MB in the end (delta: 981.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 202.72 ms. Allocated memory is still 379.6 MB. Free memory was 356.1 MB in the beginning and 340.8 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 823121.83 ms. Allocated memory was 379.6 MB in the beginning and 1.1 GB in the end (delta: 763.4 MB). Free memory was 340.3 MB in the beginning and 635.1 MB in the end (delta: -294.8 MB). Peak memory consumption was 472.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3744states) and FLOYD_HOARE automaton (currently 28 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3744states) and FLOYD_HOARE automaton (currently 28 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3744states) and FLOYD_HOARE automaton (currently 28 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3744states) and FLOYD_HOARE automaton (currently 28 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3744states) and FLOYD_HOARE automaton (currently 28 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3744states) and FLOYD_HOARE automaton (currently 28 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3744states) and FLOYD_HOARE automaton (currently 28 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 823004.0ms, OverallIterations: 471, TraceHistogramMax: 2, EmptinessCheckTime: 1338.0ms, AutomataDifference: 554748.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 31509 SDtfs, 89966 SDslu, 286195 SDs, 0 SdLazy, 432685 SolverSat, 49312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 161569.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27660 GetRequests, 6938 SyntacticMatches, 561 SemanticMatches, 20160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297002 ImplicationChecksByTransitivity, 453982.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3747occurred in iteration=454, InterpolantAutomatonStates: 17457, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 14793.3ms AutomataMinimizationTime, 470 MinimizatonAttempts, 277148 StatesRemovedByMinimization, 469 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1527.4ms SsaConstructionTime, 3916.4ms SatisfiabilityAnalysisTime, 144895.9ms InterpolantComputationTime, 21788 NumberOfCodeBlocks, 21788 NumberOfCodeBlocksAsserted, 1439 NumberOfCheckSat, 20858 ConstructedInterpolants, 496 QuantifiedInterpolants, 302861 SizeOfPredicates, 3725 NumberOfNonLiveVariables, 37758 ConjunctsInSsa, 13939 ConjunctsInUnsatCore, 930 InterpolantComputations, 12 PerfectInterpolantSequences, 165/5466 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown