/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-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 15:11:16,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 15:11:16,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 15:11:16,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 15:11:16,646 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 [2021-05-03 15:11:16,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 15:11:16,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 15:11:16,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 15:11:16,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 15:11:16,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 15:11:16,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 15:11:16,680 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 15:11:16,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 15:11:16,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 15:11:16,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 15:11:16,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 15:11:16,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 15:11:16,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 15:11:16,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 15:11:16,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 15:11:16,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 15:11:16,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 15:11:16,682 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 15:11:16,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 15:11:16,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 15:11:16,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 15:11:16,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 15:11:16,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 15:11:16,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:11:16,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 15:11:16,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 15:11:16,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 15:11:16,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 15:11:16,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 15:11:16,683 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 15:11:16,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 15:11:16,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 15:11:16,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 15:11:17,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 15:11:17,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 15:11:17,021 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 15:11:17,023 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 15:11:17,024 INFO L432 ainManager$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 [2021-05-03 15:11:17,024 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2021-05-03 15:11:17,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 15:11:17,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 15:11:17,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 15:11:17,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 15:11:17,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 15:11:17,078 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 03.05 03:11:17" (1/1) ... [2021-05-03 15:11:17,085 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 03.05 03:11:17" (1/1) ... [2021-05-03 15:11:17,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 15:11:17,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 15:11:17,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 15:11:17,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 15:11:17,102 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 03.05 03:11:17" (1/1) ... [2021-05-03 15:11:17,103 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 03.05 03:11:17" (1/1) ... [2021-05-03 15:11:17,104 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 03.05 03:11:17" (1/1) ... [2021-05-03 15:11:17,104 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 03.05 03:11:17" (1/1) ... [2021-05-03 15:11:17,107 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 03.05 03:11:17" (1/1) ... [2021-05-03 15:11:17,110 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 03.05 03:11:17" (1/1) ... [2021-05-03 15:11:17,111 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 03.05 03:11:17" (1/1) ... [2021-05-03 15:11:17,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 15:11:17,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 15:11:17,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 15:11:17,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 15:11:17,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:11:17" (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 [2021-05-03 15:11:17,193 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 15:11:17,193 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 15:11:17,193 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 15:11:17,194 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 15:11:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 15:11:17,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 15:11:17,194 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 15:11:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 15:11:17,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 15:11:17,194 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 15:11:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 15:11:17,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 15:11:17,195 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 15:11:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 15:11:17,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 15:11:17,197 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 15:11:17,384 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 15:11:17,384 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-03 15:11:17,385 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-03 15:11:17,385 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-05-03 15:11:17,386 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-05-03 15:11:17,387 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:11:17 BoogieIcfgContainer [2021-05-03 15:11:17,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 15:11:17,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 15:11:17,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 15:11:17,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 15:11:17,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:11:17" (1/2) ... [2021-05-03 15:11:17,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43426b71 and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 03:11:17, skipping insertion in model container [2021-05-03 15:11:17,393 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 03.05 03:11:17" (2/2) ... [2021-05-03 15:11:17,394 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2021-05-03 15:11:17,400 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 15:11:17,400 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 15:11:17,403 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 15:11:17,404 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 15:11:17,463 INFO L149 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-05-03 15:11:17,487 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-05-03 15:11:17,520 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 15:11:17,520 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 15:11:17,520 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 15:11:17,521 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 15:11:17,521 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 15:11:17,521 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 15:11:17,521 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 15:11:17,521 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 15:11:17,546 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-05-03 15:11:17,585 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) [2021-05-03 15:11:17,588 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) [2021-05-03 15:11:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 15:11:17,596 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:17,597 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:17,597 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:17,603 INFO L82 PathProgramCache]: Analyzing trace with hash 848381826, now seen corresponding path program 1 times [2021-05-03 15:11:17,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:17,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313953470] [2021-05-03 15:11:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:17,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313953470] [2021-05-03 15:11:17,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:17,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:11:17,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659848571] [2021-05-03 15:11:17,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:11:17,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:17,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:11:17,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:11:17,872 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) [2021-05-03 15:11:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:17,953 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2021-05-03 15:11:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 15:11:17,955 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 [2021-05-03 15:11:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:17,973 INFO L225 Difference]: With dead ends: 253 [2021-05-03 15:11:17,974 INFO L226 Difference]: Without dead ends: 247 [2021-05-03 15:11:17,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-03 15:11:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2021-05-03 15:11:18,047 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) [2021-05-03 15:11:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-05-03 15:11:18,050 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2021-05-03 15:11:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:18,051 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-05-03 15:11:18,051 INFO L481 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) [2021-05-03 15:11:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-05-03 15:11:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 15:11:18,055 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:18,056 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:18,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 15:11:18,057 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:18,062 INFO L82 PathProgramCache]: Analyzing trace with hash 890214852, now seen corresponding path program 2 times [2021-05-03 15:11:18,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:18,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494663312] [2021-05-03 15:11:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:18,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494663312] [2021-05-03 15:11:18,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:18,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:11:18,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793310041] [2021-05-03 15:11:18,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:11:18,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:18,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:11:18,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:11:18,167 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) [2021-05-03 15:11:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:18,226 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2021-05-03 15:11:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 15:11:18,227 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 [2021-05-03 15:11:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:18,230 INFO L225 Difference]: With dead ends: 262 [2021-05-03 15:11:18,231 INFO L226 Difference]: Without dead ends: 256 [2021-05-03 15:11:18,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-03 15:11:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2021-05-03 15:11:18,260 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) [2021-05-03 15:11:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2021-05-03 15:11:18,263 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2021-05-03 15:11:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:18,263 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2021-05-03 15:11:18,263 INFO L481 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) [2021-05-03 15:11:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2021-05-03 15:11:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:18,265 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:18,265 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:18,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 15:11:18,265 INFO L428 AbstractCegarLoop]: === Iteration 3 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1702344252, now seen corresponding path program 1 times [2021-05-03 15:11:18,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:18,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274355392] [2021-05-03 15:11:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:18,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274355392] [2021-05-03 15:11:18,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812601966] [2021-05-03 15:11:18,332 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 [2021-05-03 15:11:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:18,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:11:18,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:18,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:18,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 15:11:18,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367654127] [2021-05-03 15:11:18,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:11:18,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:18,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:11:18,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:11:18,579 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) [2021-05-03 15:11:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:18,644 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2021-05-03 15:11:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:11:18,645 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 [2021-05-03 15:11:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:18,650 INFO L225 Difference]: With dead ends: 199 [2021-05-03 15:11:18,650 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 15:11:18,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:11:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 15:11:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2021-05-03 15:11:18,656 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) [2021-05-03 15:11:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2021-05-03 15:11:18,657 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2021-05-03 15:11:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:18,658 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2021-05-03 15:11:18,658 INFO L481 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) [2021-05-03 15:11:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2021-05-03 15:11:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:18,659 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:18,659 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:18,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 15:11:18,881 INFO L428 AbstractCegarLoop]: === Iteration 4 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash -735916285, now seen corresponding path program 1 times [2021-05-03 15:11:18,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:18,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975912911] [2021-05-03 15:11:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:18,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975912911] [2021-05-03 15:11:18,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:18,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:11:18,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498252513] [2021-05-03 15:11:18,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:11:18,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:18,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:11:18,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:18,938 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) [2021-05-03 15:11:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:19,020 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2021-05-03 15:11:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:11:19,021 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 [2021-05-03 15:11:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:19,023 INFO L225 Difference]: With dead ends: 246 [2021-05-03 15:11:19,023 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 15:11:19,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:11:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 15:11:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-05-03 15:11:19,040 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) [2021-05-03 15:11:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2021-05-03 15:11:19,041 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2021-05-03 15:11:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:19,041 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2021-05-03 15:11:19,041 INFO L481 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) [2021-05-03 15:11:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2021-05-03 15:11:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:19,044 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:19,044 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:19,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 15:11:19,045 INFO L428 AbstractCegarLoop]: === Iteration 5 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1382578898, now seen corresponding path program 1 times [2021-05-03 15:11:19,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:19,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731027421] [2021-05-03 15:11:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:19,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731027421] [2021-05-03 15:11:19,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:19,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:11:19,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20928096] [2021-05-03 15:11:19,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 15:11:19,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 15:11:19,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:11:19,080 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) [2021-05-03 15:11:19,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:19,093 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2021-05-03 15:11:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 15:11:19,094 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 [2021-05-03 15:11:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:19,095 INFO L225 Difference]: With dead ends: 153 [2021-05-03 15:11:19,095 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 15:11:19,095 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:11:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 15:11:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-05-03 15:11:19,099 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) [2021-05-03 15:11:19,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2021-05-03 15:11:19,100 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2021-05-03 15:11:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:19,100 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2021-05-03 15:11:19,101 INFO L481 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) [2021-05-03 15:11:19,101 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2021-05-03 15:11:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:19,101 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:19,102 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:19,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 15:11:19,102 INFO L428 AbstractCegarLoop]: === Iteration 6 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:19,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969668, now seen corresponding path program 2 times [2021-05-03 15:11:19,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:19,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041111325] [2021-05-03 15:11:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:19,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041111325] [2021-05-03 15:11:19,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991731163] [2021-05-03 15:11:19,150 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 [2021-05-03 15:11:19,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:19,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:19,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:11:19,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:19,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:19,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 15:11:19,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256807390] [2021-05-03 15:11:19,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:11:19,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:19,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:11:19,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:11:19,306 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) [2021-05-03 15:11:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:19,386 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2021-05-03 15:11:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:11:19,387 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 [2021-05-03 15:11:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:19,389 INFO L225 Difference]: With dead ends: 205 [2021-05-03 15:11:19,389 INFO L226 Difference]: Without dead ends: 205 [2021-05-03 15:11:19,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:11:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-03 15:11:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-05-03 15:11:19,395 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) [2021-05-03 15:11:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2021-05-03 15:11:19,396 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2021-05-03 15:11:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:19,397 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2021-05-03 15:11:19,397 INFO L481 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) [2021-05-03 15:11:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2021-05-03 15:11:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:19,398 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:19,398 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:19,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:19,621 INFO L428 AbstractCegarLoop]: === Iteration 7 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash -141666181, now seen corresponding path program 2 times [2021-05-03 15:11:19,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:19,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81183613] [2021-05-03 15:11:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:19,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81183613] [2021-05-03 15:11:19,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:19,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:11:19,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599398490] [2021-05-03 15:11:19,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:11:19,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:19,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:11:19,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:19,663 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) [2021-05-03 15:11:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:19,759 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2021-05-03 15:11:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:11:19,760 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 [2021-05-03 15:11:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:19,761 INFO L225 Difference]: With dead ends: 253 [2021-05-03 15:11:19,761 INFO L226 Difference]: Without dead ends: 244 [2021-05-03 15:11:19,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:11:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-03 15:11:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-05-03 15:11:19,767 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) [2021-05-03 15:11:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2021-05-03 15:11:19,768 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2021-05-03 15:11:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:19,768 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2021-05-03 15:11:19,768 INFO L481 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) [2021-05-03 15:11:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2021-05-03 15:11:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:19,769 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:19,769 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:19,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 15:11:19,770 INFO L428 AbstractCegarLoop]: === Iteration 8 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:19,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2044687976, now seen corresponding path program 3 times [2021-05-03 15:11:19,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:19,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175624904] [2021-05-03 15:11:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:19,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175624904] [2021-05-03 15:11:19,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:19,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:11:19,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838885511] [2021-05-03 15:11:19,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:11:19,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:19,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:11:19,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:19,795 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) [2021-05-03 15:11:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:19,850 INFO L93 Difference]: Finished difference Result 211 states and 560 transitions. [2021-05-03 15:11:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:11:19,850 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 [2021-05-03 15:11:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:19,853 INFO L225 Difference]: With dead ends: 211 [2021-05-03 15:11:19,853 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 15:11:19,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:11:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 15:11:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-05-03 15:11:19,858 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) [2021-05-03 15:11:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 444 transitions. [2021-05-03 15:11:19,859 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 444 transitions. Word has length 18 [2021-05-03 15:11:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:19,860 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 444 transitions. [2021-05-03 15:11:19,860 INFO L481 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) [2021-05-03 15:11:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 444 transitions. [2021-05-03 15:11:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:19,861 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:19,861 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:19,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 15:11:19,861 INFO L428 AbstractCegarLoop]: === Iteration 9 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1877852891, now seen corresponding path program 3 times [2021-05-03 15:11:19,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:19,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359468731] [2021-05-03 15:11:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:19,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359468731] [2021-05-03 15:11:19,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:19,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:11:19,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603520173] [2021-05-03 15:11:19,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:11:19,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:11:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:19,885 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) [2021-05-03 15:11:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:19,935 INFO L93 Difference]: Finished difference Result 190 states and 515 transitions. [2021-05-03 15:11:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:11:19,936 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 [2021-05-03 15:11:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:19,937 INFO L225 Difference]: With dead ends: 190 [2021-05-03 15:11:19,937 INFO L226 Difference]: Without dead ends: 190 [2021-05-03 15:11:19,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:11:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-03 15:11:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2021-05-03 15:11:19,942 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) [2021-05-03 15:11:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-05-03 15:11:19,942 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-05-03 15:11:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:19,943 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-05-03 15:11:19,943 INFO L481 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) [2021-05-03 15:11:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-05-03 15:11:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:19,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:19,944 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:19,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 15:11:19,944 INFO L428 AbstractCegarLoop]: === Iteration 10 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:19,944 INFO L82 PathProgramCache]: Analyzing trace with hash -663824830, now seen corresponding path program 4 times [2021-05-03 15:11:19,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:19,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477996492] [2021-05-03 15:11:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:19,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477996492] [2021-05-03 15:11:19,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821401906] [2021-05-03 15:11:19,981 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) [2021-05-03 15:11:20,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:20,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:20,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:11:20,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:20,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:20,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 15:11:20,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672227301] [2021-05-03 15:11:20,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:11:20,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:11:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:11:20,070 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) [2021-05-03 15:11:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:20,132 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2021-05-03 15:11:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:11:20,135 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 [2021-05-03 15:11:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:20,136 INFO L225 Difference]: With dead ends: 193 [2021-05-03 15:11:20,136 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 15:11:20,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:11:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 15:11:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-05-03 15:11:20,141 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) [2021-05-03 15:11:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-05-03 15:11:20,142 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-05-03 15:11:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:20,142 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-05-03 15:11:20,142 INFO L481 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) [2021-05-03 15:11:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-05-03 15:11:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:20,143 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:20,143 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:20,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 15:11:20,344 INFO L428 AbstractCegarLoop]: === Iteration 11 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash 810916037, now seen corresponding path program 4 times [2021-05-03 15:11:20,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:20,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601723843] [2021-05-03 15:11:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:20,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601723843] [2021-05-03 15:11:20,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:20,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:11:20,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231785394] [2021-05-03 15:11:20,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:11:20,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:11:20,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:20,373 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) [2021-05-03 15:11:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:20,428 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2021-05-03 15:11:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:11:20,428 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 [2021-05-03 15:11:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:20,429 INFO L225 Difference]: With dead ends: 197 [2021-05-03 15:11:20,430 INFO L226 Difference]: Without dead ends: 188 [2021-05-03 15:11:20,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:11:20,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-03 15:11:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2021-05-03 15:11:20,435 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) [2021-05-03 15:11:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2021-05-03 15:11:20,436 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2021-05-03 15:11:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:20,436 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2021-05-03 15:11:20,437 INFO L481 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) [2021-05-03 15:11:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2021-05-03 15:11:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:20,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:20,438 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:20,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 15:11:20,438 INFO L428 AbstractCegarLoop]: === Iteration 12 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:20,438 INFO L82 PathProgramCache]: Analyzing trace with hash -951885686, now seen corresponding path program 5 times [2021-05-03 15:11:20,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:20,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764529831] [2021-05-03 15:11:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:20,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764529831] [2021-05-03 15:11:20,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:20,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:11:20,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507231599] [2021-05-03 15:11:20,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:11:20,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:20,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:11:20,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:20,461 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) [2021-05-03 15:11:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:20,543 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2021-05-03 15:11:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:11:20,544 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 [2021-05-03 15:11:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:20,546 INFO L225 Difference]: With dead ends: 248 [2021-05-03 15:11:20,546 INFO L226 Difference]: Without dead ends: 245 [2021-05-03 15:11:20,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:11:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-03 15:11:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2021-05-03 15:11:20,552 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) [2021-05-03 15:11:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 452 transitions. [2021-05-03 15:11:20,553 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 452 transitions. Word has length 18 [2021-05-03 15:11:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:20,554 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 452 transitions. [2021-05-03 15:11:20,554 INFO L481 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) [2021-05-03 15:11:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 452 transitions. [2021-05-03 15:11:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:20,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:20,555 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:20,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 15:11:20,555 INFO L428 AbstractCegarLoop]: === Iteration 13 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:20,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1324312115, now seen corresponding path program 5 times [2021-05-03 15:11:20,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:20,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236405684] [2021-05-03 15:11:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:20,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236405684] [2021-05-03 15:11:20,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:20,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:11:20,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262097597] [2021-05-03 15:11:20,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:11:20,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:11:20,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:20,578 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) [2021-05-03 15:11:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:20,624 INFO L93 Difference]: Finished difference Result 190 states and 503 transitions. [2021-05-03 15:11:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:11:20,626 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 [2021-05-03 15:11:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:20,627 INFO L225 Difference]: With dead ends: 190 [2021-05-03 15:11:20,627 INFO L226 Difference]: Without dead ends: 190 [2021-05-03 15:11:20,627 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:11:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-03 15:11:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 161. [2021-05-03 15:11:20,632 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) [2021-05-03 15:11:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2021-05-03 15:11:20,633 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2021-05-03 15:11:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:20,633 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2021-05-03 15:11:20,633 INFO L481 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) [2021-05-03 15:11:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2021-05-03 15:11:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:20,634 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:20,634 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:20,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 15:11:20,635 INFO L428 AbstractCegarLoop]: === Iteration 14 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:20,635 INFO L82 PathProgramCache]: Analyzing trace with hash 11936556, now seen corresponding path program 6 times [2021-05-03 15:11:20,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:20,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839888228] [2021-05-03 15:11:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:20,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839888228] [2021-05-03 15:11:20,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:20,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:11:20,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513663273] [2021-05-03 15:11:20,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:11:20,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:20,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:11:20,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:20,656 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) [2021-05-03 15:11:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:20,711 INFO L93 Difference]: Finished difference Result 164 states and 446 transitions. [2021-05-03 15:11:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:11:20,711 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 [2021-05-03 15:11:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:20,713 INFO L225 Difference]: With dead ends: 164 [2021-05-03 15:11:20,713 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 15:11:20,713 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:11:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 15:11:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-05-03 15:11:20,717 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) [2021-05-03 15:11:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 442 transitions. [2021-05-03 15:11:20,718 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 442 transitions. Word has length 18 [2021-05-03 15:11:20,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:20,719 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 442 transitions. [2021-05-03 15:11:20,719 INFO L481 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) [2021-05-03 15:11:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 442 transitions. [2021-05-03 15:11:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 15:11:20,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:20,720 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:20,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 15:11:20,720 INFO L428 AbstractCegarLoop]: === Iteration 15 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:20,720 INFO L82 PathProgramCache]: Analyzing trace with hash 459545933, now seen corresponding path program 6 times [2021-05-03 15:11:20,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:20,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344616669] [2021-05-03 15:11:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:20,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344616669] [2021-05-03 15:11:20,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:11:20,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:11:20,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613947995] [2021-05-03 15:11:20,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:11:20,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:11:20,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:11:20,743 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) [2021-05-03 15:11:20,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:20,791 INFO L93 Difference]: Finished difference Result 153 states and 422 transitions. [2021-05-03 15:11:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:11:20,791 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 [2021-05-03 15:11:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:20,792 INFO L225 Difference]: With dead ends: 153 [2021-05-03 15:11:20,793 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 15:11:20,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:11:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 15:11:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 135. [2021-05-03 15:11:20,801 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) [2021-05-03 15:11:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-05-03 15:11:20,801 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2021-05-03 15:11:20,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:20,802 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-05-03 15:11:20,802 INFO L481 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) [2021-05-03 15:11:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-05-03 15:11:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:20,802 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:20,803 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:20,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 15:11:20,803 INFO L428 AbstractCegarLoop]: === Iteration 16 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:20,804 INFO L82 PathProgramCache]: Analyzing trace with hash 442648773, now seen corresponding path program 1 times [2021-05-03 15:11:20,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:20,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566210097] [2021-05-03 15:11:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:20,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566210097] [2021-05-03 15:11:20,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391297455] [2021-05-03 15:11:20,938 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 [2021-05-03 15:11:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:20,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:21,135 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 [2021-05-03 15:11:21,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:21,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:21,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:21,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-05-03 15:11:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:21,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:21,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 15:11:21,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857980033] [2021-05-03 15:11:21,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:21,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:21,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:21,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:21,188 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) [2021-05-03 15:11:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:21,637 INFO L93 Difference]: Finished difference Result 382 states and 1086 transitions. [2021-05-03 15:11:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:11:21,637 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 [2021-05-03 15:11:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:21,640 INFO L225 Difference]: With dead ends: 382 [2021-05-03 15:11:21,640 INFO L226 Difference]: Without dead ends: 372 [2021-05-03 15:11:21,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:11:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-05-03 15:11:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 186. [2021-05-03 15:11:21,656 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) [2021-05-03 15:11:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2021-05-03 15:11:21,658 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2021-05-03 15:11:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:21,658 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2021-05-03 15:11:21,658 INFO L481 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) [2021-05-03 15:11:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2021-05-03 15:11:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:21,659 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:21,659 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:21,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:21,882 INFO L428 AbstractCegarLoop]: === Iteration 17 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:21,883 INFO L82 PathProgramCache]: Analyzing trace with hash 600946541, now seen corresponding path program 2 times [2021-05-03 15:11:21,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:21,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641871700] [2021-05-03 15:11:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:21,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641871700] [2021-05-03 15:11:21,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918943420] [2021-05-03 15:11:21,986 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 [2021-05-03 15:11:22,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:22,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:22,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:22,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:22,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:22,259 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 [2021-05-03 15:11:22,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:22,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:22,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:22,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-05-03 15:11:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:22,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:22,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 15:11:22,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000031782] [2021-05-03 15:11:22,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:22,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:22,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:22,366 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) [2021-05-03 15:11:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:23,281 INFO L93 Difference]: Finished difference Result 399 states and 1155 transitions. [2021-05-03 15:11:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:11:23,281 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 [2021-05-03 15:11:23,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:23,284 INFO L225 Difference]: With dead ends: 399 [2021-05-03 15:11:23,284 INFO L226 Difference]: Without dead ends: 389 [2021-05-03 15:11:23,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:11:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-03 15:11:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 189. [2021-05-03 15:11:23,290 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) [2021-05-03 15:11:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 530 transitions. [2021-05-03 15:11:23,291 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 530 transitions. Word has length 20 [2021-05-03 15:11:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:23,291 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 530 transitions. [2021-05-03 15:11:23,292 INFO L481 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) [2021-05-03 15:11:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 530 transitions. [2021-05-03 15:11:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:23,292 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:23,292 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:23,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 15:11:23,513 INFO L428 AbstractCegarLoop]: === Iteration 18 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:23,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:23,513 INFO L82 PathProgramCache]: Analyzing trace with hash 424405109, now seen corresponding path program 3 times [2021-05-03 15:11:23,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:23,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850332169] [2021-05-03 15:11:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:23,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850332169] [2021-05-03 15:11:23,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807521213] [2021-05-03 15:11:23,639 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 [2021-05-03 15:11:23,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:11:23,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:23,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:23,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:23,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:23,760 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 [2021-05-03 15:11:23,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:23,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:23,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:23,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:11:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:23,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:23,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 15:11:23,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835553628] [2021-05-03 15:11:23,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:23,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:23,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:23,916 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) [2021-05-03 15:11:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:24,771 INFO L93 Difference]: Finished difference Result 363 states and 1048 transitions. [2021-05-03 15:11:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:11:24,772 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 [2021-05-03 15:11:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:24,774 INFO L225 Difference]: With dead ends: 363 [2021-05-03 15:11:24,774 INFO L226 Difference]: Without dead ends: 353 [2021-05-03 15:11:24,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 690.8ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:11:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-03 15:11:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 192. [2021-05-03 15:11:24,781 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) [2021-05-03 15:11:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 539 transitions. [2021-05-03 15:11:24,782 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 539 transitions. Word has length 20 [2021-05-03 15:11:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:24,783 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 539 transitions. [2021-05-03 15:11:24,783 INFO L481 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) [2021-05-03 15:11:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 539 transitions. [2021-05-03 15:11:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:24,784 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:24,785 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:24,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:24,999 INFO L428 AbstractCegarLoop]: === Iteration 19 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash -409333331, now seen corresponding path program 4 times [2021-05-03 15:11:24,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:24,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014734667] [2021-05-03 15:11:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:25,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014734667] [2021-05-03 15:11:25,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288755356] [2021-05-03 15:11:25,140 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 [2021-05-03 15:11:25,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:25,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:25,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:25,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:25,304 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 [2021-05-03 15:11:25,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:25,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:25,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:25,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-05-03 15:11:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:25,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:25,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:25,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944464389] [2021-05-03 15:11:25,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:25,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:25,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:25,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:25,374 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) [2021-05-03 15:11:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:25,885 INFO L93 Difference]: Finished difference Result 310 states and 882 transitions. [2021-05-03 15:11:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:11:25,886 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 [2021-05-03 15:11:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:25,889 INFO L225 Difference]: With dead ends: 310 [2021-05-03 15:11:25,889 INFO L226 Difference]: Without dead ends: 298 [2021-05-03 15:11:25,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:11:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-03 15:11:25,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2021-05-03 15:11:25,896 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) [2021-05-03 15:11:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 601 transitions. [2021-05-03 15:11:25,897 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 601 transitions. Word has length 20 [2021-05-03 15:11:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:25,897 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 601 transitions. [2021-05-03 15:11:25,897 INFO L481 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) [2021-05-03 15:11:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 601 transitions. [2021-05-03 15:11:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:25,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:25,898 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:26,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:26,124 INFO L428 AbstractCegarLoop]: === Iteration 20 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash -908838833, now seen corresponding path program 1 times [2021-05-03 15:11:26,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:26,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198441528] [2021-05-03 15:11:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:26,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198441528] [2021-05-03 15:11:26,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341768134] [2021-05-03 15:11:26,228 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 [2021-05-03 15:11:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:26,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:26,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:26,351 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 [2021-05-03 15:11:26,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:26,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:26,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:26,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-05-03 15:11:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:26,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:26,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 15:11:26,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106654856] [2021-05-03 15:11:26,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:26,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:26,387 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) [2021-05-03 15:11:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:26,763 INFO L93 Difference]: Finished difference Result 423 states and 1216 transitions. [2021-05-03 15:11:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:11:26,764 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 [2021-05-03 15:11:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:26,769 INFO L225 Difference]: With dead ends: 423 [2021-05-03 15:11:26,769 INFO L226 Difference]: Without dead ends: 414 [2021-05-03 15:11:26,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:11:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-03 15:11:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 216. [2021-05-03 15:11:26,777 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) [2021-05-03 15:11:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 621 transitions. [2021-05-03 15:11:26,778 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 621 transitions. Word has length 20 [2021-05-03 15:11:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:26,778 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 621 transitions. [2021-05-03 15:11:26,779 INFO L481 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) [2021-05-03 15:11:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 621 transitions. [2021-05-03 15:11:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:26,779 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:26,780 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:26,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 15:11:26,985 INFO L428 AbstractCegarLoop]: === Iteration 21 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1199871497, now seen corresponding path program 2 times [2021-05-03 15:11:26,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:26,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642126205] [2021-05-03 15:11:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:27,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642126205] [2021-05-03 15:11:27,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329686580] [2021-05-03 15:11:27,084 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) [2021-05-03 15:11:27,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:27,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:27,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:27,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:27,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-05-03 15:11:27,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:27,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:27,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:27,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-05-03 15:11:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:27,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:27,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 15:11:27,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375728711] [2021-05-03 15:11:27,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:11:27,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:27,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:11:27,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:11:27,416 INFO L87 Difference]: Start difference. First operand 216 states and 621 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-05-03 15:11:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:28,051 INFO L93 Difference]: Finished difference Result 360 states and 1047 transitions. [2021-05-03 15:11:28,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:11:28,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 [2021-05-03 15:11:28,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:28,053 INFO L225 Difference]: With dead ends: 360 [2021-05-03 15:11:28,053 INFO L226 Difference]: Without dead ends: 351 [2021-05-03 15:11:28,054 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:11:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-03 15:11:28,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 219. [2021-05-03 15:11:28,060 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) [2021-05-03 15:11:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 631 transitions. [2021-05-03 15:11:28,061 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 631 transitions. Word has length 20 [2021-05-03 15:11:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:28,061 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 631 transitions. [2021-05-03 15:11:28,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-05-03 15:11:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 631 transitions. [2021-05-03 15:11:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:28,062 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:28,063 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:28,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:28,273 INFO L428 AbstractCegarLoop]: === Iteration 22 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:28,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2066945939, now seen corresponding path program 3 times [2021-05-03 15:11:28,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:28,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457473099] [2021-05-03 15:11:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:28,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457473099] [2021-05-03 15:11:28,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48686819] [2021-05-03 15:11:28,341 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 [2021-05-03 15:11:28,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:11:28,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:28,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:28,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:28,502 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 [2021-05-03 15:11:28,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:28,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:28,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:28,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-05-03 15:11:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:28,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:28,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 15:11:28,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956960999] [2021-05-03 15:11:28,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:28,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:28,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:28,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:28,692 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) [2021-05-03 15:11:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:29,311 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-05-03 15:11:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:11:29,311 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 [2021-05-03 15:11:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:29,317 INFO L225 Difference]: With dead ends: 343 [2021-05-03 15:11:29,317 INFO L226 Difference]: Without dead ends: 334 [2021-05-03 15:11:29,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:11:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-03 15:11:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 222. [2021-05-03 15:11:29,327 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) [2021-05-03 15:11:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 641 transitions. [2021-05-03 15:11:29,328 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 641 transitions. Word has length 20 [2021-05-03 15:11:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:29,329 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 641 transitions. [2021-05-03 15:11:29,329 INFO L481 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) [2021-05-03 15:11:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 641 transitions. [2021-05-03 15:11:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:29,330 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:29,330 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:29,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 15:11:29,554 INFO L428 AbstractCegarLoop]: === Iteration 23 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:29,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:29,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1904435179, now seen corresponding path program 4 times [2021-05-03 15:11:29,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:29,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996179097] [2021-05-03 15:11:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:29,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996179097] [2021-05-03 15:11:29,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051731698] [2021-05-03 15:11:29,622 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) [2021-05-03 15:11:29,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:29,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:29,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:29,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:29,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:29,748 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 [2021-05-03 15:11:29,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:29,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:29,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:29,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-05-03 15:11:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:29,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:29,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 15:11:29,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124245399] [2021-05-03 15:11:29,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:29,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:29,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:29,816 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) [2021-05-03 15:11:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:30,049 INFO L93 Difference]: Finished difference Result 318 states and 927 transitions. [2021-05-03 15:11:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:11:30,049 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 [2021-05-03 15:11:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:30,051 INFO L225 Difference]: With dead ends: 318 [2021-05-03 15:11:30,051 INFO L226 Difference]: Without dead ends: 307 [2021-05-03 15:11:30,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:11:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-03 15:11:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 224. [2021-05-03 15:11:30,057 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) [2021-05-03 15:11:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-05-03 15:11:30,058 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-05-03 15:11:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:30,058 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-05-03 15:11:30,059 INFO L481 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) [2021-05-03 15:11:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-05-03 15:11:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:30,059 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:30,059 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:30,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-03 15:11:30,283 INFO L428 AbstractCegarLoop]: === Iteration 24 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:30,283 INFO L82 PathProgramCache]: Analyzing trace with hash -453703043, now seen corresponding path program 5 times [2021-05-03 15:11:30,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:30,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084584183] [2021-05-03 15:11:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:30,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084584183] [2021-05-03 15:11:30,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396114369] [2021-05-03 15:11:30,384 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 [2021-05-03 15:11:30,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:30,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:30,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:30,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:30,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:30,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-05-03 15:11:30,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:30,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:30,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:30,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-05-03 15:11:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:30,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:30,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:30,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699118423] [2021-05-03 15:11:30,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:30,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:30,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:30,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:30,572 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) [2021-05-03 15:11:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:30,822 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-05-03 15:11:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:30,822 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 [2021-05-03 15:11:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:30,824 INFO L225 Difference]: With dead ends: 328 [2021-05-03 15:11:30,824 INFO L226 Difference]: Without dead ends: 318 [2021-05-03 15:11:30,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-03 15:11:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 224. [2021-05-03 15:11:30,830 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) [2021-05-03 15:11:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-05-03 15:11:30,831 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-05-03 15:11:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:30,831 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-05-03 15:11:30,831 INFO L481 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) [2021-05-03 15:11:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-05-03 15:11:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:30,832 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:30,832 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:31,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:31,061 INFO L428 AbstractCegarLoop]: === Iteration 25 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -236278157, now seen corresponding path program 6 times [2021-05-03 15:11:31,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:31,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108938070] [2021-05-03 15:11:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:31,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108938070] [2021-05-03 15:11:31,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797365916] [2021-05-03 15:11:31,168 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 [2021-05-03 15:11:31,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:11:31,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:31,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:31,267 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 [2021-05-03 15:11:31,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:31,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:31,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:31,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:11:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:31,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:31,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 15:11:31,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688149034] [2021-05-03 15:11:31,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:31,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:31,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:31,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:31,394 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) [2021-05-03 15:11:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:32,251 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-05-03 15:11:32,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:11:32,251 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 [2021-05-03 15:11:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:32,253 INFO L225 Difference]: With dead ends: 462 [2021-05-03 15:11:32,253 INFO L226 Difference]: Without dead ends: 442 [2021-05-03 15:11:32,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 682.1ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:11:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-03 15:11:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 235. [2021-05-03 15:11:32,261 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) [2021-05-03 15:11:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-05-03 15:11:32,262 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-05-03 15:11:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:32,262 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-05-03 15:11:32,263 INFO L481 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) [2021-05-03 15:11:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-05-03 15:11:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:32,263 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:32,263 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:32,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 15:11:32,477 INFO L428 AbstractCegarLoop]: === Iteration 26 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash 188465799, now seen corresponding path program 5 times [2021-05-03 15:11:32,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:32,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079780296] [2021-05-03 15:11:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:32,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079780296] [2021-05-03 15:11:32,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70631204] [2021-05-03 15:11:32,558 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 [2021-05-03 15:11:32,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:32,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:32,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:32,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:32,709 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 [2021-05-03 15:11:32,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:32,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:32,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:32,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-05-03 15:11:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:32,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:32,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:32,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941030145] [2021-05-03 15:11:32,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:32,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:32,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:32,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:32,747 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) [2021-05-03 15:11:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:33,010 INFO L93 Difference]: Finished difference Result 327 states and 955 transitions. [2021-05-03 15:11:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:33,011 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 [2021-05-03 15:11:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:33,012 INFO L225 Difference]: With dead ends: 327 [2021-05-03 15:11:33,012 INFO L226 Difference]: Without dead ends: 318 [2021-05-03 15:11:33,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-03 15:11:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 238. [2021-05-03 15:11:33,018 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) [2021-05-03 15:11:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 704 transitions. [2021-05-03 15:11:33,019 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 704 transitions. Word has length 20 [2021-05-03 15:11:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:33,019 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 704 transitions. [2021-05-03 15:11:33,019 INFO L481 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) [2021-05-03 15:11:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 704 transitions. [2021-05-03 15:11:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:33,020 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:33,020 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:33,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:33,233 INFO L428 AbstractCegarLoop]: === Iteration 27 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:33,233 INFO L82 PathProgramCache]: Analyzing trace with hash -839684061, now seen corresponding path program 6 times [2021-05-03 15:11:33,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:33,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663684143] [2021-05-03 15:11:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:33,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663684143] [2021-05-03 15:11:33,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490930703] [2021-05-03 15:11:33,302 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 [2021-05-03 15:11:33,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:11:33,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:33,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:33,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:33,429 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 [2021-05-03 15:11:33,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:33,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:33,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:33,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-05-03 15:11:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:33,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:33,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 15:11:33,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736808270] [2021-05-03 15:11:33,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:33,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:33,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:33,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:33,566 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) [2021-05-03 15:11:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:34,083 INFO L93 Difference]: Finished difference Result 341 states and 1001 transitions. [2021-05-03 15:11:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:11:34,084 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 [2021-05-03 15:11:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:34,085 INFO L225 Difference]: With dead ends: 341 [2021-05-03 15:11:34,085 INFO L226 Difference]: Without dead ends: 332 [2021-05-03 15:11:34,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:11:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-03 15:11:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 241. [2021-05-03 15:11:34,091 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) [2021-05-03 15:11:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 714 transitions. [2021-05-03 15:11:34,092 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 714 transitions. Word has length 20 [2021-05-03 15:11:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:34,093 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 714 transitions. [2021-05-03 15:11:34,093 INFO L481 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) [2021-05-03 15:11:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 714 transitions. [2021-05-03 15:11:34,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:34,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:34,094 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:34,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 15:11:34,309 INFO L428 AbstractCegarLoop]: === Iteration 28 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash -516097883, now seen corresponding path program 7 times [2021-05-03 15:11:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:34,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128047692] [2021-05-03 15:11:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:34,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128047692] [2021-05-03 15:11:34,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926133489] [2021-05-03 15:11:34,381 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:11:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:34,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:34,487 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 [2021-05-03 15:11:34,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:34,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:34,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:34,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-05-03 15:11:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:34,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:34,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 15:11:34,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403343764] [2021-05-03 15:11:34,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:34,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:34,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:34,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:34,552 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) [2021-05-03 15:11:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:34,713 INFO L93 Difference]: Finished difference Result 310 states and 911 transitions. [2021-05-03 15:11:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:34,714 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 [2021-05-03 15:11:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:34,715 INFO L225 Difference]: With dead ends: 310 [2021-05-03 15:11:34,716 INFO L226 Difference]: Without dead ends: 299 [2021-05-03 15:11:34,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-03 15:11:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 235. [2021-05-03 15:11:34,722 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) [2021-05-03 15:11:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-05-03 15:11:34,722 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-05-03 15:11:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:34,723 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-05-03 15:11:34,723 INFO L481 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) [2021-05-03 15:11:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-05-03 15:11:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:34,724 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:34,724 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:34,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:34,946 INFO L428 AbstractCegarLoop]: === Iteration 29 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:34,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:34,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1628624025, now seen corresponding path program 7 times [2021-05-03 15:11:34,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:34,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740365137] [2021-05-03 15:11:34,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:35,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740365137] [2021-05-03 15:11:35,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800774246] [2021-05-03 15:11:35,050 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) [2021-05-03 15:11:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:35,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:35,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:35,127 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 [2021-05-03 15:11:35,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:35,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:35,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:35,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-05-03 15:11:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:35,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:35,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:35,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14662442] [2021-05-03 15:11:35,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:35,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:35,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:35,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:35,196 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) [2021-05-03 15:11:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:35,435 INFO L93 Difference]: Finished difference Result 350 states and 1025 transitions. [2021-05-03 15:11:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:11:35,435 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 [2021-05-03 15:11:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:35,437 INFO L225 Difference]: With dead ends: 350 [2021-05-03 15:11:35,437 INFO L226 Difference]: Without dead ends: 340 [2021-05-03 15:11:35,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-03 15:11:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 246. [2021-05-03 15:11:35,445 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) [2021-05-03 15:11:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-03 15:11:35,446 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 20 [2021-05-03 15:11:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:35,446 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-03 15:11:35,446 INFO L481 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) [2021-05-03 15:11:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-03 15:11:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:35,447 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:35,447 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:35,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-03 15:11:35,669 INFO L428 AbstractCegarLoop]: === Iteration 30 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:35,669 INFO L82 PathProgramCache]: Analyzing trace with hash -162237149, now seen corresponding path program 8 times [2021-05-03 15:11:35,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:35,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889370468] [2021-05-03 15:11:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:35,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889370468] [2021-05-03 15:11:35,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080980015] [2021-05-03 15:11:35,773 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) [2021-05-03 15:11:35,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:35,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:11:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:35,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:35,869 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 [2021-05-03 15:11:35,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:35,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:35,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:35,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:26 [2021-05-03 15:11:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:35,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:35,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 15:11:35,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686260986] [2021-05-03 15:11:35,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:35,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:35,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:35,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:35,981 INFO L87 Difference]: Start difference. First operand 246 states and 738 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) [2021-05-03 15:11:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:36,315 INFO L93 Difference]: Finished difference Result 404 states and 1198 transitions. [2021-05-03 15:11:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:11:36,315 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 [2021-05-03 15:11:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:36,317 INFO L225 Difference]: With dead ends: 404 [2021-05-03 15:11:36,317 INFO L226 Difference]: Without dead ends: 382 [2021-05-03 15:11:36,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-03 15:11:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 256. [2021-05-03 15:11:36,324 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) [2021-05-03 15:11:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-05-03 15:11:36,325 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-05-03 15:11:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:36,325 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-05-03 15:11:36,325 INFO L481 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) [2021-05-03 15:11:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-05-03 15:11:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:36,326 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:36,326 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:36,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-03 15:11:36,541 INFO L428 AbstractCegarLoop]: === Iteration 31 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash -428870833, now seen corresponding path program 8 times [2021-05-03 15:11:36,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:36,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484970283] [2021-05-03 15:11:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:36,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484970283] [2021-05-03 15:11:36,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147895796] [2021-05-03 15:11:36,640 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 [2021-05-03 15:11:36,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:36,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:36,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:11:36,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:36,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:36,740 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 [2021-05-03 15:11:36,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:36,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:36,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:36,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:26 [2021-05-03 15:11:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:36,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:36,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 15:11:36,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967551746] [2021-05-03 15:11:36,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:36,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:36,857 INFO L87 Difference]: Start difference. First operand 256 states and 781 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) [2021-05-03 15:11:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:37,287 INFO L93 Difference]: Finished difference Result 350 states and 1049 transitions. [2021-05-03 15:11:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:11:37,288 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 [2021-05-03 15:11:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:37,289 INFO L225 Difference]: With dead ends: 350 [2021-05-03 15:11:37,289 INFO L226 Difference]: Without dead ends: 341 [2021-05-03 15:11:37,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:11:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-05-03 15:11:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 259. [2021-05-03 15:11:37,296 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) [2021-05-03 15:11:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 791 transitions. [2021-05-03 15:11:37,297 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 791 transitions. Word has length 20 [2021-05-03 15:11:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:37,297 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 791 transitions. [2021-05-03 15:11:37,297 INFO L481 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) [2021-05-03 15:11:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 791 transitions. [2021-05-03 15:11:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:37,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:37,298 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:37,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 15:11:37,501 INFO L428 AbstractCegarLoop]: === Iteration 32 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash -105284655, now seen corresponding path program 9 times [2021-05-03 15:11:37,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:37,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241844575] [2021-05-03 15:11:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:37,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241844575] [2021-05-03 15:11:37,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987025167] [2021-05-03 15:11:37,573 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 [2021-05-03 15:11:37,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:11:37,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:37,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:37,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:37,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:37,660 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 [2021-05-03 15:11:37,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:37,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:37,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:37,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:11:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:37,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:37,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:11:37,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255285534] [2021-05-03 15:11:37,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:37,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:37,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:37,801 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) [2021-05-03 15:11:38,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:38,446 INFO L93 Difference]: Finished difference Result 353 states and 1060 transitions. [2021-05-03 15:11:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:11:38,447 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 [2021-05-03 15:11:38,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:38,448 INFO L225 Difference]: With dead ends: 353 [2021-05-03 15:11:38,448 INFO L226 Difference]: Without dead ends: 340 [2021-05-03 15:11:38,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:11:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-03 15:11:38,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 256. [2021-05-03 15:11:38,455 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) [2021-05-03 15:11:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-05-03 15:11:38,456 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-05-03 15:11:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:38,456 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-05-03 15:11:38,456 INFO L481 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) [2021-05-03 15:11:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-05-03 15:11:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:38,457 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:38,457 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:38,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-03 15:11:38,673 INFO L428 AbstractCegarLoop]: === Iteration 33 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 431638013, now seen corresponding path program 9 times [2021-05-03 15:11:38,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:38,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638138461] [2021-05-03 15:11:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:38,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638138461] [2021-05-03 15:11:38,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840375913] [2021-05-03 15:11:38,768 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 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 [2021-05-03 15:11:38,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:11:38,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:38,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:38,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:38,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-05-03 15:11:38,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:38,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:38,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:38,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-05-03 15:11:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:39,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:39,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:11:39,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158635649] [2021-05-03 15:11:39,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:39,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:39,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:39,013 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) [2021-05-03 15:11:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:39,911 INFO L93 Difference]: Finished difference Result 485 states and 1380 transitions. [2021-05-03 15:11:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:11:39,911 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 [2021-05-03 15:11:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:39,913 INFO L225 Difference]: With dead ends: 485 [2021-05-03 15:11:39,913 INFO L226 Difference]: Without dead ends: 458 [2021-05-03 15:11:39,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:11:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-03 15:11:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 293. [2021-05-03 15:11:39,921 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) [2021-05-03 15:11:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 904 transitions. [2021-05-03 15:11:39,922 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 904 transitions. Word has length 20 [2021-05-03 15:11:39,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:39,922 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 904 transitions. [2021-05-03 15:11:39,923 INFO L481 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) [2021-05-03 15:11:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 904 transitions. [2021-05-03 15:11:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:39,924 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:39,924 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:40,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-03 15:11:40,141 INFO L428 AbstractCegarLoop]: === Iteration 34 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash 226719879, now seen corresponding path program 10 times [2021-05-03 15:11:40,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:40,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305001074] [2021-05-03 15:11:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:40,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305001074] [2021-05-03 15:11:40,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805101863] [2021-05-03 15:11:40,227 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 [2021-05-03 15:11:40,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:40,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:40,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:40,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:40,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:40,334 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 [2021-05-03 15:11:40,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:40,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:40,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:40,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-05-03 15:11:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:40,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:40,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 15:11:40,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688085042] [2021-05-03 15:11:40,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:40,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:40,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:40,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:40,375 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) [2021-05-03 15:11:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:40,524 INFO L93 Difference]: Finished difference Result 371 states and 1128 transitions. [2021-05-03 15:11:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:40,524 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 [2021-05-03 15:11:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:40,526 INFO L225 Difference]: With dead ends: 371 [2021-05-03 15:11:40,526 INFO L226 Difference]: Without dead ends: 360 [2021-05-03 15:11:40,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:11:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-03 15:11:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 295. [2021-05-03 15:11:40,532 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) [2021-05-03 15:11:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 908 transitions. [2021-05-03 15:11:40,533 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 908 transitions. Word has length 20 [2021-05-03 15:11:40,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:40,533 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 908 transitions. [2021-05-03 15:11:40,533 INFO L481 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) [2021-05-03 15:11:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 908 transitions. [2021-05-03 15:11:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:40,534 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:40,534 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:40,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:40,757 INFO L428 AbstractCegarLoop]: === Iteration 35 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:40,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2027400643, now seen corresponding path program 10 times [2021-05-03 15:11:40,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:40,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247232691] [2021-05-03 15:11:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:40,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247232691] [2021-05-03 15:11:40,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421913241] [2021-05-03 15:11:40,837 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 [2021-05-03 15:11:40,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:40,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:40,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:40,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:40,939 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 [2021-05-03 15:11:40,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:40,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:40,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:40,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-05-03 15:11:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:40,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:40,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:40,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611751120] [2021-05-03 15:11:40,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:40,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:40,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:40,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:40,975 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) [2021-05-03 15:11:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:41,128 INFO L93 Difference]: Finished difference Result 412 states and 1240 transitions. [2021-05-03 15:11:41,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:41,129 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 [2021-05-03 15:11:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:41,130 INFO L225 Difference]: With dead ends: 412 [2021-05-03 15:11:41,130 INFO L226 Difference]: Without dead ends: 402 [2021-05-03 15:11:41,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-05-03 15:11:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 298. [2021-05-03 15:11:41,136 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) [2021-05-03 15:11:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-05-03 15:11:41,137 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-05-03 15:11:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:41,137 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-05-03 15:11:41,137 INFO L481 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) [2021-05-03 15:11:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-05-03 15:11:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:41,138 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:41,138 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:41,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:41,345 INFO L428 AbstractCegarLoop]: === Iteration 36 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:41,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1645911141, now seen corresponding path program 11 times [2021-05-03 15:11:41,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:41,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184162458] [2021-05-03 15:11:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:41,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184162458] [2021-05-03 15:11:41,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402628486] [2021-05-03 15:11:41,434 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 [2021-05-03 15:11:41,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:41,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:41,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:41,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:41,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:41,535 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 [2021-05-03 15:11:41,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:41,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:41,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:41,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:10 [2021-05-03 15:11:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:41,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:41,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 15:11:41,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440426799] [2021-05-03 15:11:41,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:41,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:41,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:41,606 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) [2021-05-03 15:11:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:42,095 INFO L93 Difference]: Finished difference Result 460 states and 1382 transitions. [2021-05-03 15:11:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:11:42,096 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 [2021-05-03 15:11:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:42,097 INFO L225 Difference]: With dead ends: 460 [2021-05-03 15:11:42,097 INFO L226 Difference]: Without dead ends: 450 [2021-05-03 15:11:42,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:11:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-03 15:11:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 298. [2021-05-03 15:11:42,103 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) [2021-05-03 15:11:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-05-03 15:11:42,104 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-05-03 15:11:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:42,105 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-05-03 15:11:42,105 INFO L481 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) [2021-05-03 15:11:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-05-03 15:11:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:42,106 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:42,106 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:42,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:42,321 INFO L428 AbstractCegarLoop]: === Iteration 37 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:42,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:42,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1815317715, now seen corresponding path program 12 times [2021-05-03 15:11:42,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:42,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349077316] [2021-05-03 15:11:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:11:42,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349077316] [2021-05-03 15:11:42,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077759536] [2021-05-03 15:11:42,426 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 [2021-05-03 15:11:42,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:11:42,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:42,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:42,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:42,520 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 [2021-05-03 15:11:42,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:42,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:42,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:42,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:11:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:42,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:42,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:11:42,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112411245] [2021-05-03 15:11:42,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:42,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:42,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:42,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:42,648 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) [2021-05-03 15:11:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:43,378 INFO L93 Difference]: Finished difference Result 552 states and 1617 transitions. [2021-05-03 15:11:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:11:43,378 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 [2021-05-03 15:11:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:43,380 INFO L225 Difference]: With dead ends: 552 [2021-05-03 15:11:43,380 INFO L226 Difference]: Without dead ends: 520 [2021-05-03 15:11:43,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:11:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-05-03 15:11:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 306. [2021-05-03 15:11:43,387 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) [2021-05-03 15:11:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-05-03 15:11:43,388 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-05-03 15:11:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:43,388 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-05-03 15:11:43,388 INFO L481 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) [2021-05-03 15:11:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-05-03 15:11:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:43,389 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:43,389 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:43,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 15:11:43,605 INFO L428 AbstractCegarLoop]: === Iteration 38 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:43,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1895521031, now seen corresponding path program 11 times [2021-05-03 15:11:43,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:43,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182481446] [2021-05-03 15:11:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:43,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182481446] [2021-05-03 15:11:43,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725080212] [2021-05-03 15:11:43,684 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) [2021-05-03 15:11:43,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:43,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:43,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:43,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:43,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:43,826 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 [2021-05-03 15:11:43,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:43,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:43,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:43,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-05-03 15:11:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:43,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:43,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:43,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060503436] [2021-05-03 15:11:43,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:43,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:43,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:43,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:43,867 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) [2021-05-03 15:11:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:44,027 INFO L93 Difference]: Finished difference Result 408 states and 1237 transitions. [2021-05-03 15:11:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:44,027 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 [2021-05-03 15:11:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:44,029 INFO L225 Difference]: With dead ends: 408 [2021-05-03 15:11:44,029 INFO L226 Difference]: Without dead ends: 399 [2021-05-03 15:11:44,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-03 15:11:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 309. [2021-05-03 15:11:44,036 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) [2021-05-03 15:11:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 961 transitions. [2021-05-03 15:11:44,037 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 961 transitions. Word has length 20 [2021-05-03 15:11:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:44,037 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 961 transitions. [2021-05-03 15:11:44,037 INFO L481 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) [2021-05-03 15:11:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 961 transitions. [2021-05-03 15:11:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:44,038 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:44,038 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:44,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:44,260 INFO L428 AbstractCegarLoop]: === Iteration 39 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1371296405, now seen corresponding path program 12 times [2021-05-03 15:11:44,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:44,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297085448] [2021-05-03 15:11:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297085448] [2021-05-03 15:11:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460244827] [2021-05-03 15:11:44,323 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) [2021-05-03 15:11:44,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:11:44,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:44,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:44,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:44,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:44,423 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 [2021-05-03 15:11:44,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:44,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:44,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:44,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-05-03 15:11:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:44,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:44,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-03 15:11:44,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089631056] [2021-05-03 15:11:44,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:11:44,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:44,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:11:44,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:11:44,516 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) [2021-05-03 15:11:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:44,951 INFO L93 Difference]: Finished difference Result 429 states and 1298 transitions. [2021-05-03 15:11:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:11:44,952 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 [2021-05-03 15:11:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:44,953 INFO L225 Difference]: With dead ends: 429 [2021-05-03 15:11:44,953 INFO L226 Difference]: Without dead ends: 420 [2021-05-03 15:11:44,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:11:44,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-03 15:11:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 312. [2021-05-03 15:11:44,958 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) [2021-05-03 15:11:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 971 transitions. [2021-05-03 15:11:44,960 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 971 transitions. Word has length 20 [2021-05-03 15:11:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:44,960 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 971 transitions. [2021-05-03 15:11:44,960 INFO L481 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) [2021-05-03 15:11:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 971 transitions. [2021-05-03 15:11:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:44,961 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:44,961 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:45,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 15:11:45,177 INFO L428 AbstractCegarLoop]: === Iteration 40 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1694882583, now seen corresponding path program 13 times [2021-05-03 15:11:45,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:45,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735067650] [2021-05-03 15:11:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:45,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735067650] [2021-05-03 15:11:45,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777410345] [2021-05-03 15:11:45,243 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 [2021-05-03 15:11:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:45,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:45,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:45,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:45,313 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 [2021-05-03 15:11:45,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:45,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:45,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:45,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-05-03 15:11:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:45,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:45,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 15:11:45,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307741396] [2021-05-03 15:11:45,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:45,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:45,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:45,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:45,369 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) [2021-05-03 15:11:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:45,543 INFO L93 Difference]: Finished difference Result 391 states and 1193 transitions. [2021-05-03 15:11:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:45,544 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 [2021-05-03 15:11:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:45,545 INFO L225 Difference]: With dead ends: 391 [2021-05-03 15:11:45,545 INFO L226 Difference]: Without dead ends: 380 [2021-05-03 15:11:45,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-03 15:11:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 306. [2021-05-03 15:11:45,553 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) [2021-05-03 15:11:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-05-03 15:11:45,554 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-05-03 15:11:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:45,555 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-05-03 15:11:45,555 INFO L481 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) [2021-05-03 15:11:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-05-03 15:11:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:45,556 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:45,556 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:45,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 15:11:45,773 INFO L428 AbstractCegarLoop]: === Iteration 41 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash -455362805, now seen corresponding path program 13 times [2021-05-03 15:11:45,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:45,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671182093] [2021-05-03 15:11:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:45,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671182093] [2021-05-03 15:11:45,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421502219] [2021-05-03 15:11:45,881 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 [2021-05-03 15:11:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:45,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:45,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:45,980 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 [2021-05-03 15:11:45,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:45,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:45,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:45,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-05-03 15:11:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:46,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:46,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:46,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413588093] [2021-05-03 15:11:46,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:46,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:46,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:46,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:46,037 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) [2021-05-03 15:11:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:46,281 INFO L93 Difference]: Finished difference Result 431 states and 1307 transitions. [2021-05-03 15:11:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:11:46,281 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 [2021-05-03 15:11:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:46,283 INFO L225 Difference]: With dead ends: 431 [2021-05-03 15:11:46,284 INFO L226 Difference]: Without dead ends: 421 [2021-05-03 15:11:46,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:46,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-05-03 15:11:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-05-03 15:11:46,290 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) [2021-05-03 15:11:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-05-03 15:11:46,291 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-05-03 15:11:46,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:46,291 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-05-03 15:11:46,292 INFO L481 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) [2021-05-03 15:11:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-05-03 15:11:46,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:46,293 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:46,293 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:46,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 15:11:46,513 INFO L428 AbstractCegarLoop]: === Iteration 42 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:46,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2048743317, now seen corresponding path program 14 times [2021-05-03 15:11:46,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:46,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047000] [2021-05-03 15:11:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:46,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047000] [2021-05-03 15:11:46,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144583522] [2021-05-03 15:11:46,602 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 [2021-05-03 15:11:46,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:46,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:46,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:11:46,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:46,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:46,699 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 [2021-05-03 15:11:46,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:46,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:46,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:46,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-05-03 15:11:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:46,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:46,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 15:11:46,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803152470] [2021-05-03 15:11:46,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:46,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:46,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:46,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:46,800 INFO L87 Difference]: Start difference. First operand 309 states and 959 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) [2021-05-03 15:11:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:47,170 INFO L93 Difference]: Finished difference Result 487 states and 1471 transitions. [2021-05-03 15:11:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:11:47,170 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 [2021-05-03 15:11:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:47,172 INFO L225 Difference]: With dead ends: 487 [2021-05-03 15:11:47,172 INFO L226 Difference]: Without dead ends: 465 [2021-05-03 15:11:47,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:11:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-05-03 15:11:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2021-05-03 15:11:47,180 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) [2021-05-03 15:11:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-05-03 15:11:47,181 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-05-03 15:11:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:47,181 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-05-03 15:11:47,181 INFO L481 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) [2021-05-03 15:11:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-05-03 15:11:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:47,182 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:47,182 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:47,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:47,393 INFO L428 AbstractCegarLoop]: === Iteration 43 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1782109633, now seen corresponding path program 14 times [2021-05-03 15:11:47,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:47,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170777061] [2021-05-03 15:11:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:47,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170777061] [2021-05-03 15:11:47,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905944006] [2021-05-03 15:11:47,489 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) [2021-05-03 15:11:47,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:47,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:47,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:11:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:47,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:47,581 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 [2021-05-03 15:11:47,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:47,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:47,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:47,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-05-03 15:11:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:47,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:47,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 15:11:47,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640454234] [2021-05-03 15:11:47,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:47,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:47,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:47,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:47,698 INFO L87 Difference]: Start difference. First operand 309 states and 959 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) [2021-05-03 15:11:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:48,093 INFO L93 Difference]: Finished difference Result 428 states and 1295 transitions. [2021-05-03 15:11:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:11:48,093 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 [2021-05-03 15:11:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:48,096 INFO L225 Difference]: With dead ends: 428 [2021-05-03 15:11:48,096 INFO L226 Difference]: Without dead ends: 419 [2021-05-03 15:11:48,096 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:11:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-03 15:11:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 312. [2021-05-03 15:11:48,103 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) [2021-05-03 15:11:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 969 transitions. [2021-05-03 15:11:48,104 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 969 transitions. Word has length 20 [2021-05-03 15:11:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:48,106 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 969 transitions. [2021-05-03 15:11:48,106 INFO L481 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) [2021-05-03 15:11:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 969 transitions. [2021-05-03 15:11:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:48,107 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:48,108 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:48,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:48,329 INFO L428 AbstractCegarLoop]: === Iteration 44 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2105695811, now seen corresponding path program 15 times [2021-05-03 15:11:48,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:48,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678653890] [2021-05-03 15:11:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:48,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678653890] [2021-05-03 15:11:48,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111130754] [2021-05-03 15:11:48,403 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 [2021-05-03 15:11:48,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:11:48,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:48,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:48,478 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 [2021-05-03 15:11:48,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:48,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:48,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:48,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:11:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:48,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:48,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:11:48,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464451956] [2021-05-03 15:11:48,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:48,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:48,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:48,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:48,621 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) [2021-05-03 15:11:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:49,484 INFO L93 Difference]: Finished difference Result 464 states and 1400 transitions. [2021-05-03 15:11:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:11:49,484 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 [2021-05-03 15:11:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:49,486 INFO L225 Difference]: With dead ends: 464 [2021-05-03 15:11:49,486 INFO L226 Difference]: Without dead ends: 451 [2021-05-03 15:11:49,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 707.3ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:11:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-05-03 15:11:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 309. [2021-05-03 15:11:49,493 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) [2021-05-03 15:11:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-05-03 15:11:49,494 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-05-03 15:11:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:49,495 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-05-03 15:11:49,495 INFO L481 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) [2021-05-03 15:11:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-05-03 15:11:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:49,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:49,495 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:49,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-03 15:11:49,699 INFO L428 AbstractCegarLoop]: === Iteration 45 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:49,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1652348817, now seen corresponding path program 15 times [2021-05-03 15:11:49,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:49,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019499793] [2021-05-03 15:11:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:49,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019499793] [2021-05-03 15:11:49,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276598754] [2021-05-03 15:11:49,793 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 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 [2021-05-03 15:11:49,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:11:49,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:49,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:49,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:49,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-05-03 15:11:49,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:49,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:49,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:49,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-05-03 15:11:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:49,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:49,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:11:49,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924834952] [2021-05-03 15:11:49,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:49,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:49,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:49,987 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) [2021-05-03 15:11:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:51,012 INFO L93 Difference]: Finished difference Result 598 states and 1728 transitions. [2021-05-03 15:11:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:11:51,012 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 [2021-05-03 15:11:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:51,015 INFO L225 Difference]: With dead ends: 598 [2021-05-03 15:11:51,015 INFO L226 Difference]: Without dead ends: 571 [2021-05-03 15:11:51,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 809.7ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:11:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-03 15:11:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 313. [2021-05-03 15:11:51,021 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) [2021-05-03 15:11:51,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 971 transitions. [2021-05-03 15:11:51,022 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 971 transitions. Word has length 20 [2021-05-03 15:11:51,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:51,023 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 971 transitions. [2021-05-03 15:11:51,023 INFO L481 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) [2021-05-03 15:11:51,023 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 971 transitions. [2021-05-03 15:11:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:51,024 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:51,024 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:51,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:51,237 INFO L428 AbstractCegarLoop]: === Iteration 46 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1857266951, now seen corresponding path program 16 times [2021-05-03 15:11:51,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:51,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964045930] [2021-05-03 15:11:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:51,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964045930] [2021-05-03 15:11:51,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534419335] [2021-05-03 15:11:51,324 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) [2021-05-03 15:11:51,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:51,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:51,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:51,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:51,436 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 [2021-05-03 15:11:51,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:51,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:51,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:51,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-05-03 15:11:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:51,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:51,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 15:11:51,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774621349] [2021-05-03 15:11:51,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:51,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:51,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:51,490 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) [2021-05-03 15:11:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:51,763 INFO L93 Difference]: Finished difference Result 403 states and 1227 transitions. [2021-05-03 15:11:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:51,763 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 [2021-05-03 15:11:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:51,765 INFO L225 Difference]: With dead ends: 403 [2021-05-03 15:11:51,765 INFO L226 Difference]: Without dead ends: 392 [2021-05-03 15:11:51,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-03 15:11:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 306. [2021-05-03 15:11:51,769 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) [2021-05-03 15:11:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-05-03 15:11:51,770 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-05-03 15:11:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:51,771 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-05-03 15:11:51,771 INFO L481 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) [2021-05-03 15:11:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-05-03 15:11:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:51,771 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:51,771 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:51,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-05-03 15:11:51,993 INFO L428 AbstractCegarLoop]: === Iteration 47 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash -76255857, now seen corresponding path program 16 times [2021-05-03 15:11:51,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:51,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129673634] [2021-05-03 15:11:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:52,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129673634] [2021-05-03 15:11:52,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36565281] [2021-05-03 15:11:52,089 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 [2021-05-03 15:11:52,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:52,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:52,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:52,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:52,180 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 [2021-05-03 15:11:52,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:52,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:52,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:52,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-05-03 15:11:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:52,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:52,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:52,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573278996] [2021-05-03 15:11:52,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:52,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:52,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:52,252 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) [2021-05-03 15:11:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:52,572 INFO L93 Difference]: Finished difference Result 448 states and 1357 transitions. [2021-05-03 15:11:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:52,572 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 [2021-05-03 15:11:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:52,574 INFO L225 Difference]: With dead ends: 448 [2021-05-03 15:11:52,574 INFO L226 Difference]: Without dead ends: 438 [2021-05-03 15:11:52,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:11:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-03 15:11:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 312. [2021-05-03 15:11:52,581 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) [2021-05-03 15:11:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-05-03 15:11:52,582 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-05-03 15:11:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:52,582 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-05-03 15:11:52,582 INFO L481 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) [2021-05-03 15:11:52,583 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-05-03 15:11:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:52,583 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:52,583 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:52,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:52,789 INFO L428 AbstractCegarLoop]: === Iteration 48 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:52,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1438435337, now seen corresponding path program 17 times [2021-05-03 15:11:52,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:52,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629762370] [2021-05-03 15:11:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:52,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629762370] [2021-05-03 15:11:52,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301177776] [2021-05-03 15:11:52,903 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 [2021-05-03 15:11:52,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:11:52,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:52,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:52,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:52,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:52,998 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 [2021-05-03 15:11:52,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:53,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:53,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:53,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-05-03 15:11:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:53,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:53,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:53,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194258104] [2021-05-03 15:11:53,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:53,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:53,066 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) [2021-05-03 15:11:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:53,460 INFO L93 Difference]: Finished difference Result 497 states and 1504 transitions. [2021-05-03 15:11:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:11:53,460 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 [2021-05-03 15:11:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:53,462 INFO L225 Difference]: With dead ends: 497 [2021-05-03 15:11:53,462 INFO L226 Difference]: Without dead ends: 485 [2021-05-03 15:11:53,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:11:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-05-03 15:11:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 312. [2021-05-03 15:11:53,469 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) [2021-05-03 15:11:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-05-03 15:11:53,472 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-05-03 15:11:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:53,473 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-05-03 15:11:53,473 INFO L481 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) [2021-05-03 15:11:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-05-03 15:11:53,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:53,474 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:53,474 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:53,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-03 15:11:53,685 INFO L428 AbstractCegarLoop]: === Iteration 49 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:53,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1865369703, now seen corresponding path program 17 times [2021-05-03 15:11:53,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:53,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898065490] [2021-05-03 15:11:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:53,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898065490] [2021-05-03 15:11:53,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673026009] [2021-05-03 15:11:53,765 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 [2021-05-03 15:11:53,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:11:53,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:53,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:53,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:53,863 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 [2021-05-03 15:11:53,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:53,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:53,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:53,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-05-03 15:11:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:53,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:53,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 15:11:53,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317736774] [2021-05-03 15:11:53,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:53,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:53,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:53,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:53,930 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) [2021-05-03 15:11:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:54,132 INFO L93 Difference]: Finished difference Result 435 states and 1319 transitions. [2021-05-03 15:11:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:54,133 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 [2021-05-03 15:11:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:54,134 INFO L225 Difference]: With dead ends: 435 [2021-05-03 15:11:54,134 INFO L226 Difference]: Without dead ends: 426 [2021-05-03 15:11:54,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-05-03 15:11:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-05-03 15:11:54,140 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) [2021-05-03 15:11:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 978 transitions. [2021-05-03 15:11:54,141 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 978 transitions. Word has length 20 [2021-05-03 15:11:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:54,141 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 978 transitions. [2021-05-03 15:11:54,141 INFO L481 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) [2021-05-03 15:11:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 978 transitions. [2021-05-03 15:11:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:54,142 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:54,142 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:54,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-03 15:11:54,365 INFO L428 AbstractCegarLoop]: === Iteration 50 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1541783525, now seen corresponding path program 18 times [2021-05-03 15:11:54,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:54,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556810604] [2021-05-03 15:11:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:54,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556810604] [2021-05-03 15:11:54,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215612566] [2021-05-03 15:11:54,454 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 [2021-05-03 15:11:54,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:11:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:54,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:54,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:54,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-05-03 15:11:54,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:54,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:54,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:54,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-05-03 15:11:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:54,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:54,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-03 15:11:54,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419110703] [2021-05-03 15:11:54,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:11:54,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:11:54,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:11:54,649 INFO L87 Difference]: Start difference. First operand 315 states and 978 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) [2021-05-03 15:11:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:54,973 INFO L93 Difference]: Finished difference Result 432 states and 1315 transitions. [2021-05-03 15:11:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:54,974 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 [2021-05-03 15:11:54,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:54,975 INFO L225 Difference]: With dead ends: 432 [2021-05-03 15:11:54,975 INFO L226 Difference]: Without dead ends: 421 [2021-05-03 15:11:54,975 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:11:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-05-03 15:11:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 312. [2021-05-03 15:11:54,980 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) [2021-05-03 15:11:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-05-03 15:11:54,980 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-05-03 15:11:54,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:54,981 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-05-03 15:11:54,981 INFO L481 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) [2021-05-03 15:11:54,981 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-05-03 15:11:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:54,982 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:54,982 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:55,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:55,193 INFO L428 AbstractCegarLoop]: === Iteration 51 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1004860857, now seen corresponding path program 18 times [2021-05-03 15:11:55,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:55,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848691430] [2021-05-03 15:11:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:55,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848691430] [2021-05-03 15:11:55,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023898367] [2021-05-03 15:11:55,288 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 [2021-05-03 15:11:55,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:11:55,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:55,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:11:55,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:55,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:55,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-05-03 15:11:55,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:55,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:55,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:55,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-05-03 15:11:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:55,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:55,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 15:11:55,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868156008] [2021-05-03 15:11:55,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:55,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:55,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:55,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:55,499 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) [2021-05-03 15:11:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:56,439 INFO L93 Difference]: Finished difference Result 644 states and 1918 transitions. [2021-05-03 15:11:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:11:56,439 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 [2021-05-03 15:11:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:56,441 INFO L225 Difference]: With dead ends: 644 [2021-05-03 15:11:56,441 INFO L226 Difference]: Without dead ends: 622 [2021-05-03 15:11:56,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 704.2ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:11:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-05-03 15:11:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 316. [2021-05-03 15:11:56,446 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) [2021-05-03 15:11:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 980 transitions. [2021-05-03 15:11:56,447 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 980 transitions. Word has length 20 [2021-05-03 15:11:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:56,447 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 980 transitions. [2021-05-03 15:11:56,447 INFO L481 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) [2021-05-03 15:11:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 980 transitions. [2021-05-03 15:11:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:56,448 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:56,448 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:56,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:56,649 INFO L428 AbstractCegarLoop]: === Iteration 52 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1209778991, now seen corresponding path program 19 times [2021-05-03 15:11:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:56,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804599278] [2021-05-03 15:11:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:56,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804599278] [2021-05-03 15:11:56,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119893537] [2021-05-03 15:11:56,764 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 [2021-05-03 15:11:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:56,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:56,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:56,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:56,887 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 [2021-05-03 15:11:56,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:56,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:56,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:56,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-05-03 15:11:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:56,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:56,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 15:11:56,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887119302] [2021-05-03 15:11:56,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:56,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:56,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:56,945 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) [2021-05-03 15:11:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:57,202 INFO L93 Difference]: Finished difference Result 437 states and 1326 transitions. [2021-05-03 15:11:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:57,202 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 [2021-05-03 15:11:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:57,203 INFO L225 Difference]: With dead ends: 437 [2021-05-03 15:11:57,203 INFO L226 Difference]: Without dead ends: 426 [2021-05-03 15:11:57,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-05-03 15:11:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-05-03 15:11:57,208 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) [2021-05-03 15:11:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 979 transitions. [2021-05-03 15:11:57,208 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 979 transitions. Word has length 20 [2021-05-03 15:11:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:57,209 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 979 transitions. [2021-05-03 15:11:57,209 INFO L481 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) [2021-05-03 15:11:57,209 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 979 transitions. [2021-05-03 15:11:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:57,209 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:57,209 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:57,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:57,410 INFO L428 AbstractCegarLoop]: === Iteration 53 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1625404767, now seen corresponding path program 19 times [2021-05-03 15:11:57,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:57,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251375477] [2021-05-03 15:11:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:57,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251375477] [2021-05-03 15:11:57,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205675471] [2021-05-03 15:11:57,522 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 [2021-05-03 15:11:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:57,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:11:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:57,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:57,630 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 [2021-05-03 15:11:57,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:57,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:57,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:57,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-05-03 15:11:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:57,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:57,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:57,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560479584] [2021-05-03 15:11:57,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:57,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:57,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:57,689 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) [2021-05-03 15:11:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:58,202 INFO L93 Difference]: Finished difference Result 577 states and 1769 transitions. [2021-05-03 15:11:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:11:58,202 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 [2021-05-03 15:11:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:58,204 INFO L225 Difference]: With dead ends: 577 [2021-05-03 15:11:58,204 INFO L226 Difference]: Without dead ends: 566 [2021-05-03 15:11:58,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:11:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-05-03 15:11:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 323. [2021-05-03 15:11:58,210 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) [2021-05-03 15:11:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1004 transitions. [2021-05-03 15:11:58,211 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1004 transitions. Word has length 20 [2021-05-03 15:11:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:58,211 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 1004 transitions. [2021-05-03 15:11:58,211 INFO L481 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) [2021-05-03 15:11:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1004 transitions. [2021-05-03 15:11:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:11:58,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:58,212 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:58,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:58,427 INFO L428 AbstractCegarLoop]: === Iteration 54 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:58,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1821665449, now seen corresponding path program 20 times [2021-05-03 15:11:58,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:58,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792360940] [2021-05-03 15:11:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:58,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792360940] [2021-05-03 15:11:58,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859894783] [2021-05-03 15:11:58,503 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 [2021-05-03 15:11:58,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:11:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:58,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:58,592 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 [2021-05-03 15:11:58,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:58,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:58,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:58,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:22 [2021-05-03 15:11:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:58,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:58,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 15:11:58,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159177349] [2021-05-03 15:11:58,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:58,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:58,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:58,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:58,674 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) [2021-05-03 15:11:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:59,047 INFO L93 Difference]: Finished difference Result 516 states and 1586 transitions. [2021-05-03 15:11:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:59,048 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 [2021-05-03 15:11:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:59,049 INFO L225 Difference]: With dead ends: 516 [2021-05-03 15:11:59,049 INFO L226 Difference]: Without dead ends: 505 [2021-05-03 15:11:59,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:11:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-05-03 15:11:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 322. [2021-05-03 15:11:59,053 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) [2021-05-03 15:11:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1003 transitions. [2021-05-03 15:11:59,054 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1003 transitions. Word has length 20 [2021-05-03 15:11:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:59,054 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 1003 transitions. [2021-05-03 15:11:59,054 INFO L481 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) [2021-05-03 15:11:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1003 transitions. [2021-05-03 15:11:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:11:59,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:59,054 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:59,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:59,255 INFO L428 AbstractCegarLoop]: === Iteration 55 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash -827696633, now seen corresponding path program 20 times [2021-05-03 15:11:59,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:59,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012433940] [2021-05-03 15:11:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:59,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012433940] [2021-05-03 15:11:59,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800843238] [2021-05-03 15:11:59,279 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 [2021-05-03 15:11:59,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:59,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:59,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:11:59,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:59,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:59,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 15:11:59,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007121486] [2021-05-03 15:11:59,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:11:59,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:59,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:11:59,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:11:59,359 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) [2021-05-03 15:11:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:59,437 INFO L93 Difference]: Finished difference Result 489 states and 1527 transitions. [2021-05-03 15:11:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:11:59,438 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 [2021-05-03 15:11:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:59,439 INFO L225 Difference]: With dead ends: 489 [2021-05-03 15:11:59,439 INFO L226 Difference]: Without dead ends: 489 [2021-05-03 15:11:59,439 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-03 15:11:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 311. [2021-05-03 15:11:59,443 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) [2021-05-03 15:11:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 993 transitions. [2021-05-03 15:11:59,443 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 993 transitions. Word has length 22 [2021-05-03 15:11:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:59,443 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 993 transitions. [2021-05-03 15:11:59,443 INFO L481 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) [2021-05-03 15:11:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 993 transitions. [2021-05-03 15:11:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:11:59,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:59,444 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:59,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:59,645 INFO L428 AbstractCegarLoop]: === Iteration 56 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:11:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:59,645 INFO L82 PathProgramCache]: Analyzing trace with hash 196643718, now seen corresponding path program 21 times [2021-05-03 15:11:59,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:59,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845397715] [2021-05-03 15:11:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:59,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845397715] [2021-05-03 15:11:59,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63474521] [2021-05-03 15:11:59,669 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 [2021-05-03 15:11:59,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:11:59,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:59,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:11:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:59,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:59,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 15:11:59,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242434784] [2021-05-03 15:11:59,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:11:59,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:11:59,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:11:59,746 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) [2021-05-03 15:11:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:59,845 INFO L93 Difference]: Finished difference Result 498 states and 1529 transitions. [2021-05-03 15:11:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:59,845 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 [2021-05-03 15:11:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:59,846 INFO L225 Difference]: With dead ends: 498 [2021-05-03 15:11:59,846 INFO L226 Difference]: Without dead ends: 439 [2021-05-03 15:11:59,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-03 15:11:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 311. [2021-05-03 15:11:59,852 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) [2021-05-03 15:11:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 983 transitions. [2021-05-03 15:11:59,852 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 983 transitions. Word has length 22 [2021-05-03 15:11:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:59,853 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 983 transitions. [2021-05-03 15:11:59,853 INFO L481 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) [2021-05-03 15:11:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 983 transitions. [2021-05-03 15:11:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:11:59,853 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:59,853 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:00,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-03 15:12:00,069 INFO L428 AbstractCegarLoop]: === Iteration 57 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:00,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1724048449, now seen corresponding path program 22 times [2021-05-03 15:12:00,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:00,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841860485] [2021-05-03 15:12:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:00,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841860485] [2021-05-03 15:12:00,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257799187] [2021-05-03 15:12:00,093 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) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:00,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:00,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:00,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:00,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:00,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:00,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130530892] [2021-05-03 15:12:00,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:00,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:00,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:00,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:00,182 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) [2021-05-03 15:12:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:00,304 INFO L93 Difference]: Finished difference Result 640 states and 1919 transitions. [2021-05-03 15:12:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:12:00,305 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 [2021-05-03 15:12:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:00,306 INFO L225 Difference]: With dead ends: 640 [2021-05-03 15:12:00,307 INFO L226 Difference]: Without dead ends: 640 [2021-05-03 15:12:00,307 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:12:00,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-05-03 15:12:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 368. [2021-05-03 15:12:00,312 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) [2021-05-03 15:12:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1186 transitions. [2021-05-03 15:12:00,313 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1186 transitions. Word has length 22 [2021-05-03 15:12:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:00,313 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1186 transitions. [2021-05-03 15:12:00,313 INFO L481 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) [2021-05-03 15:12:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1186 transitions. [2021-05-03 15:12:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:00,313 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:00,313 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:00,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 15:12:00,514 INFO L428 AbstractCegarLoop]: === Iteration 58 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:00,514 INFO L82 PathProgramCache]: Analyzing trace with hash 40343294, now seen corresponding path program 23 times [2021-05-03 15:12:00,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:00,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386199580] [2021-05-03 15:12:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:00,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386199580] [2021-05-03 15:12:00,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66706019] [2021-05-03 15:12:00,538 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) [2021-05-03 15:12:00,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:00,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:00,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:00,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:00,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:00,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865377148] [2021-05-03 15:12:00,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:00,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:00,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:00,622 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) [2021-05-03 15:12:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:00,767 INFO L93 Difference]: Finished difference Result 772 states and 2287 transitions. [2021-05-03 15:12:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:12:00,768 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 [2021-05-03 15:12:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:00,769 INFO L225 Difference]: With dead ends: 772 [2021-05-03 15:12:00,769 INFO L226 Difference]: Without dead ends: 728 [2021-05-03 15:12:00,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:12:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-05-03 15:12:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-05-03 15:12:00,776 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) [2021-05-03 15:12:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1634 transitions. [2021-05-03 15:12:00,777 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1634 transitions. Word has length 22 [2021-05-03 15:12:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:00,777 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1634 transitions. [2021-05-03 15:12:00,777 INFO L481 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) [2021-05-03 15:12:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1634 transitions. [2021-05-03 15:12:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:00,778 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:00,778 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:00,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 15:12:00,978 INFO L428 AbstractCegarLoop]: === Iteration 59 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash 358278619, now seen corresponding path program 24 times [2021-05-03 15:12:00,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:00,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202098316] [2021-05-03 15:12:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:01,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202098316] [2021-05-03 15:12:01,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908128962] [2021-05-03 15:12:01,003 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) [2021-05-03 15:12:01,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:12:01,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:01,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:01,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:01,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:01,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647466146] [2021-05-03 15:12:01,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:01,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:01,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:01,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:01,091 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) [2021-05-03 15:12:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:01,209 INFO L93 Difference]: Finished difference Result 972 states and 2907 transitions. [2021-05-03 15:12:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:12:01,209 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 [2021-05-03 15:12:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:01,211 INFO L225 Difference]: With dead ends: 972 [2021-05-03 15:12:01,211 INFO L226 Difference]: Without dead ends: 972 [2021-05-03 15:12:01,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:12:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-05-03 15:12:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 557. [2021-05-03 15:12:01,218 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) [2021-05-03 15:12:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1845 transitions. [2021-05-03 15:12:01,219 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1845 transitions. Word has length 22 [2021-05-03 15:12:01,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:01,219 INFO L480 AbstractCegarLoop]: Abstraction has 557 states and 1845 transitions. [2021-05-03 15:12:01,219 INFO L481 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) [2021-05-03 15:12:01,219 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1845 transitions. [2021-05-03 15:12:01,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:01,220 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:01,220 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:01,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:01,421 INFO L428 AbstractCegarLoop]: === Iteration 60 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash -527046306, now seen corresponding path program 25 times [2021-05-03 15:12:01,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:01,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955997906] [2021-05-03 15:12:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:01,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955997906] [2021-05-03 15:12:01,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559326076] [2021-05-03 15:12:01,447 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) [2021-05-03 15:12:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:01,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:01,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:01,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:01,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191489111] [2021-05-03 15:12:01,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:01,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:01,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:01,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:01,548 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) [2021-05-03 15:12:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:01,711 INFO L93 Difference]: Finished difference Result 964 states and 2972 transitions. [2021-05-03 15:12:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:12:01,712 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 [2021-05-03 15:12:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:01,713 INFO L225 Difference]: With dead ends: 964 [2021-05-03 15:12:01,713 INFO L226 Difference]: Without dead ends: 916 [2021-05-03 15:12:01,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:12:01,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-05-03 15:12:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 606. [2021-05-03 15:12:01,722 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) [2021-05-03 15:12:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2017 transitions. [2021-05-03 15:12:01,723 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2017 transitions. Word has length 22 [2021-05-03 15:12:01,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:01,723 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 2017 transitions. [2021-05-03 15:12:01,723 INFO L481 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) [2021-05-03 15:12:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2017 transitions. [2021-05-03 15:12:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:01,724 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:01,724 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:01,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 15:12:01,925 INFO L428 AbstractCegarLoop]: === Iteration 61 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1135425701, now seen corresponding path program 26 times [2021-05-03 15:12:01,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:01,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770839629] [2021-05-03 15:12:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:01,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770839629] [2021-05-03 15:12:01,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212339405] [2021-05-03 15:12:01,949 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 [2021-05-03 15:12:01,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:01,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:01,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:01,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:02,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:02,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:02,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070224016] [2021-05-03 15:12:02,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:02,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:02,034 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) [2021-05-03 15:12:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:02,213 INFO L93 Difference]: Finished difference Result 881 states and 2727 transitions. [2021-05-03 15:12:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:12:02,213 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 [2021-05-03 15:12:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:02,215 INFO L225 Difference]: With dead ends: 881 [2021-05-03 15:12:02,215 INFO L226 Difference]: Without dead ends: 871 [2021-05-03 15:12:02,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:12:02,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-05-03 15:12:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 612. [2021-05-03 15:12:02,223 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) [2021-05-03 15:12:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2020 transitions. [2021-05-03 15:12:02,224 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2020 transitions. Word has length 22 [2021-05-03 15:12:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:02,225 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 2020 transitions. [2021-05-03 15:12:02,225 INFO L481 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) [2021-05-03 15:12:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2020 transitions. [2021-05-03 15:12:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:02,226 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:02,226 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:02,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 15:12:02,446 INFO L428 AbstractCegarLoop]: === Iteration 62 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:02,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1507852130, now seen corresponding path program 27 times [2021-05-03 15:12:02,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:02,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294438143] [2021-05-03 15:12:02,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:02,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294438143] [2021-05-03 15:12:02,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468120733] [2021-05-03 15:12:02,470 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 [2021-05-03 15:12:02,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:02,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:02,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:02,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:02,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:02,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636326240] [2021-05-03 15:12:02,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:02,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:02,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:02,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:02,548 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) [2021-05-03 15:12:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:02,690 INFO L93 Difference]: Finished difference Result 917 states and 2822 transitions. [2021-05-03 15:12:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:12:02,690 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 [2021-05-03 15:12:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:02,692 INFO L225 Difference]: With dead ends: 917 [2021-05-03 15:12:02,692 INFO L226 Difference]: Without dead ends: 893 [2021-05-03 15:12:02,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:12:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-05-03 15:12:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 606. [2021-05-03 15:12:02,704 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) [2021-05-03 15:12:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2011 transitions. [2021-05-03 15:12:02,705 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2011 transitions. Word has length 22 [2021-05-03 15:12:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:02,706 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 2011 transitions. [2021-05-03 15:12:02,706 INFO L481 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) [2021-05-03 15:12:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2011 transitions. [2021-05-03 15:12:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:02,707 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:02,707 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:02,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:02,926 INFO L428 AbstractCegarLoop]: === Iteration 63 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:02,927 INFO L82 PathProgramCache]: Analyzing trace with hash 326583295, now seen corresponding path program 28 times [2021-05-03 15:12:02,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:02,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875444401] [2021-05-03 15:12:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875444401] [2021-05-03 15:12:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658532095] [2021-05-03 15:12:02,952 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) [2021-05-03 15:12:02,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:02,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:02,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:03,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:03,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 15:12:03,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035094282] [2021-05-03 15:12:03,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:12:03,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:03,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:12:03,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:12:03,066 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) [2021-05-03 15:12:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:03,272 INFO L93 Difference]: Finished difference Result 1221 states and 3751 transitions. [2021-05-03 15:12:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:12:03,272 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 [2021-05-03 15:12:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:03,275 INFO L225 Difference]: With dead ends: 1221 [2021-05-03 15:12:03,275 INFO L226 Difference]: Without dead ends: 1221 [2021-05-03 15:12:03,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:12:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-05-03 15:12:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 650. [2021-05-03 15:12:03,288 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) [2021-05-03 15:12:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2182 transitions. [2021-05-03 15:12:03,290 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2182 transitions. Word has length 22 [2021-05-03 15:12:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:03,290 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 2182 transitions. [2021-05-03 15:12:03,290 INFO L481 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) [2021-05-03 15:12:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2182 transitions. [2021-05-03 15:12:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:03,292 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:03,292 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:03,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-03 15:12:03,505 INFO L428 AbstractCegarLoop]: === Iteration 64 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:03,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1657114921, now seen corresponding path program 29 times [2021-05-03 15:12:03,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:03,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439718013] [2021-05-03 15:12:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:03,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439718013] [2021-05-03 15:12:03,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984081599] [2021-05-03 15:12:03,524 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 [2021-05-03 15:12:03,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:12:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:03,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:03,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:03,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:03,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 15:12:03,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470043013] [2021-05-03 15:12:03,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:03,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:03,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:03,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:03,620 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) [2021-05-03 15:12:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:03,753 INFO L93 Difference]: Finished difference Result 1386 states and 4279 transitions. [2021-05-03 15:12:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:12:03,753 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 [2021-05-03 15:12:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:03,756 INFO L225 Difference]: With dead ends: 1386 [2021-05-03 15:12:03,756 INFO L226 Difference]: Without dead ends: 1386 [2021-05-03 15:12:03,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:12:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-05-03 15:12:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 762. [2021-05-03 15:12:03,771 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) [2021-05-03 15:12:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2624 transitions. [2021-05-03 15:12:03,773 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2624 transitions. Word has length 22 [2021-05-03 15:12:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:03,773 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2624 transitions. [2021-05-03 15:12:03,774 INFO L481 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) [2021-05-03 15:12:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2624 transitions. [2021-05-03 15:12:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:03,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:03,775 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:03,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-03 15:12:03,989 INFO L428 AbstractCegarLoop]: === Iteration 65 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:03,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1144148055, now seen corresponding path program 30 times [2021-05-03 15:12:03,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:03,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281831689] [2021-05-03 15:12:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:12:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281831689] [2021-05-03 15:12:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946818246] [2021-05-03 15:12:04,007 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) [2021-05-03 15:12:04,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:12:04,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:04,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:04,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:04,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 15:12:04,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679791672] [2021-05-03 15:12:04,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:04,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:04,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:04,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:04,090 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) [2021-05-03 15:12:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:04,286 INFO L93 Difference]: Finished difference Result 1253 states and 3889 transitions. [2021-05-03 15:12:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:12:04,286 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 [2021-05-03 15:12:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:04,290 INFO L225 Difference]: With dead ends: 1253 [2021-05-03 15:12:04,290 INFO L226 Difference]: Without dead ends: 1244 [2021-05-03 15:12:04,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-05-03 15:12:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 762. [2021-05-03 15:12:04,306 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) [2021-05-03 15:12:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2602 transitions. [2021-05-03 15:12:04,308 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2602 transitions. Word has length 22 [2021-05-03 15:12:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:04,308 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 2602 transitions. [2021-05-03 15:12:04,308 INFO L481 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) [2021-05-03 15:12:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2602 transitions. [2021-05-03 15:12:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:04,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:04,310 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:04,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-03 15:12:04,531 INFO L428 AbstractCegarLoop]: === Iteration 66 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1294632791, now seen corresponding path program 31 times [2021-05-03 15:12:04,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:04,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220060380] [2021-05-03 15:12:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:04,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220060380] [2021-05-03 15:12:04,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418369306] [2021-05-03 15:12:04,554 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 [2021-05-03 15:12:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:04,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:04,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:04,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:04,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 15:12:04,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26179773] [2021-05-03 15:12:04,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:12:04,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:04,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:12:04,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:12:04,638 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) [2021-05-03 15:12:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:04,858 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-05-03 15:12:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:12:04,858 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 [2021-05-03 15:12:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:04,861 INFO L225 Difference]: With dead ends: 1263 [2021-05-03 15:12:04,862 INFO L226 Difference]: Without dead ends: 1251 [2021-05-03 15:12:04,862 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-05-03 15:12:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 847. [2021-05-03 15:12:04,878 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) [2021-05-03 15:12:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2922 transitions. [2021-05-03 15:12:04,881 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2922 transitions. Word has length 22 [2021-05-03 15:12:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:04,881 INFO L480 AbstractCegarLoop]: Abstraction has 847 states and 2922 transitions. [2021-05-03 15:12:04,881 INFO L481 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) [2021-05-03 15:12:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2922 transitions. [2021-05-03 15:12:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:04,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:04,883 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:05,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:05,105 INFO L428 AbstractCegarLoop]: === Iteration 67 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:05,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:05,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1456964799, now seen corresponding path program 32 times [2021-05-03 15:12:05,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:05,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94965284] [2021-05-03 15:12:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:05,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94965284] [2021-05-03 15:12:05,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551321038] [2021-05-03 15:12:05,130 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 [2021-05-03 15:12:05,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:05,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:05,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:05,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:05,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:05,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 15:12:05,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520607560] [2021-05-03 15:12:05,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:12:05,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:05,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:12:05,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:12:05,219 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) [2021-05-03 15:12:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:05,397 INFO L93 Difference]: Finished difference Result 1246 states and 3991 transitions. [2021-05-03 15:12:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:12:05,397 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 [2021-05-03 15:12:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:05,404 INFO L225 Difference]: With dead ends: 1246 [2021-05-03 15:12:05,404 INFO L226 Difference]: Without dead ends: 1246 [2021-05-03 15:12:05,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:12:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-05-03 15:12:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 888. [2021-05-03 15:12:05,422 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) [2021-05-03 15:12:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3083 transitions. [2021-05-03 15:12:05,424 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3083 transitions. Word has length 22 [2021-05-03 15:12:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:05,424 INFO L480 AbstractCegarLoop]: Abstraction has 888 states and 3083 transitions. [2021-05-03 15:12:05,424 INFO L481 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) [2021-05-03 15:12:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3083 transitions. [2021-05-03 15:12:05,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:05,426 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:05,426 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:05,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:05,641 INFO L428 AbstractCegarLoop]: === Iteration 68 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:05,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1570199292, now seen corresponding path program 33 times [2021-05-03 15:12:05,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:05,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097774012] [2021-05-03 15:12:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:05,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097774012] [2021-05-03 15:12:05,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043082924] [2021-05-03 15:12:05,664 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) [2021-05-03 15:12:05,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:05,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:05,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:05,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:05,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 15:12:05,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224757110] [2021-05-03 15:12:05,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:12:05,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:05,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:12:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:12:05,755 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) [2021-05-03 15:12:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:05,988 INFO L93 Difference]: Finished difference Result 1362 states and 4328 transitions. [2021-05-03 15:12:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:12:05,988 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 [2021-05-03 15:12:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:05,992 INFO L225 Difference]: With dead ends: 1362 [2021-05-03 15:12:05,992 INFO L226 Difference]: Without dead ends: 1275 [2021-05-03 15:12:05,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:12:05,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-05-03 15:12:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 976. [2021-05-03 15:12:06,019 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) [2021-05-03 15:12:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3371 transitions. [2021-05-03 15:12:06,022 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3371 transitions. Word has length 22 [2021-05-03 15:12:06,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:06,022 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 3371 transitions. [2021-05-03 15:12:06,022 INFO L481 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) [2021-05-03 15:12:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3371 transitions. [2021-05-03 15:12:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:06,024 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:06,024 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:06,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:06,241 INFO L428 AbstractCegarLoop]: === Iteration 69 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:06,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1138465271, now seen corresponding path program 34 times [2021-05-03 15:12:06,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:06,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407904155] [2021-05-03 15:12:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:06,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407904155] [2021-05-03 15:12:06,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373893395] [2021-05-03 15:12:06,260 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 [2021-05-03 15:12:06,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:06,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:06,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:06,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:06,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 15:12:06,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662969991] [2021-05-03 15:12:06,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:06,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:06,348 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) [2021-05-03 15:12:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:06,498 INFO L93 Difference]: Finished difference Result 1340 states and 4319 transitions. [2021-05-03 15:12:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:12:06,499 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 [2021-05-03 15:12:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:06,501 INFO L225 Difference]: With dead ends: 1340 [2021-05-03 15:12:06,501 INFO L226 Difference]: Without dead ends: 1331 [2021-05-03 15:12:06,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:12:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-05-03 15:12:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 928. [2021-05-03 15:12:06,511 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) [2021-05-03 15:12:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3172 transitions. [2021-05-03 15:12:06,513 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3172 transitions. Word has length 22 [2021-05-03 15:12:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:06,513 INFO L480 AbstractCegarLoop]: Abstraction has 928 states and 3172 transitions. [2021-05-03 15:12:06,513 INFO L481 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) [2021-05-03 15:12:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3172 transitions. [2021-05-03 15:12:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:06,515 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:06,515 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:06,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:06,715 INFO L428 AbstractCegarLoop]: === Iteration 70 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1510891700, now seen corresponding path program 35 times [2021-05-03 15:12:06,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:06,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173310758] [2021-05-03 15:12:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:06,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173310758] [2021-05-03 15:12:06,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914469847] [2021-05-03 15:12:06,737 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) [2021-05-03 15:12:06,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:06,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:06,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:06,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:06,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 15:12:06,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167942368] [2021-05-03 15:12:06,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:06,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:06,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:06,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:06,832 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) [2021-05-03 15:12:06,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:06,975 INFO L93 Difference]: Finished difference Result 1477 states and 4669 transitions. [2021-05-03 15:12:06,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:12:06,975 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 [2021-05-03 15:12:06,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:06,978 INFO L225 Difference]: With dead ends: 1477 [2021-05-03 15:12:06,978 INFO L226 Difference]: Without dead ends: 1435 [2021-05-03 15:12:06,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:12:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-05-03 15:12:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1075. [2021-05-03 15:12:07,001 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) [2021-05-03 15:12:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3686 transitions. [2021-05-03 15:12:07,004 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3686 transitions. Word has length 22 [2021-05-03 15:12:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:07,004 INFO L480 AbstractCegarLoop]: Abstraction has 1075 states and 3686 transitions. [2021-05-03 15:12:07,004 INFO L481 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) [2021-05-03 15:12:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3686 transitions. [2021-05-03 15:12:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:07,006 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:07,006 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:07,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 15:12:07,229 INFO L428 AbstractCegarLoop]: === Iteration 71 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:07,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1381268681, now seen corresponding path program 36 times [2021-05-03 15:12:07,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:07,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179471510] [2021-05-03 15:12:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:07,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179471510] [2021-05-03 15:12:07,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241039783] [2021-05-03 15:12:07,251 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 [2021-05-03 15:12:07,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:12:07,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:07,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:07,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:07,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 15:12:07,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906031297] [2021-05-03 15:12:07,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:07,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:07,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:07,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:07,350 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) [2021-05-03 15:12:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:07,484 INFO L93 Difference]: Finished difference Result 1825 states and 5875 transitions. [2021-05-03 15:12:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:12:07,484 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 [2021-05-03 15:12:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:07,488 INFO L225 Difference]: With dead ends: 1825 [2021-05-03 15:12:07,488 INFO L226 Difference]: Without dead ends: 1825 [2021-05-03 15:12:07,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:12:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-05-03 15:12:07,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1237. [2021-05-03 15:12:07,512 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) [2021-05-03 15:12:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4330 transitions. [2021-05-03 15:12:07,516 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4330 transitions. Word has length 22 [2021-05-03 15:12:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:07,516 INFO L480 AbstractCegarLoop]: Abstraction has 1237 states and 4330 transitions. [2021-05-03 15:12:07,516 INFO L481 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) [2021-05-03 15:12:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4330 transitions. [2021-05-03 15:12:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:07,518 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:07,519 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:07,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-03 15:12:07,723 INFO L428 AbstractCegarLoop]: === Iteration 72 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash 495943756, now seen corresponding path program 37 times [2021-05-03 15:12:07,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:07,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387421336] [2021-05-03 15:12:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:07,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387421336] [2021-05-03 15:12:07,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616128477] [2021-05-03 15:12:07,741 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 [2021-05-03 15:12:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:07,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:07,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:07,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 15:12:07,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403054063] [2021-05-03 15:12:07,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:07,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:07,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:07,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:07,828 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) [2021-05-03 15:12:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:08,014 INFO L93 Difference]: Finished difference Result 1507 states and 5030 transitions. [2021-05-03 15:12:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:12:08,014 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 [2021-05-03 15:12:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:08,017 INFO L225 Difference]: With dead ends: 1507 [2021-05-03 15:12:08,017 INFO L226 Difference]: Without dead ends: 1464 [2021-05-03 15:12:08,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:12:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-05-03 15:12:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1278. [2021-05-03 15:12:08,035 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) [2021-05-03 15:12:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4513 transitions. [2021-05-03 15:12:08,038 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4513 transitions. Word has length 22 [2021-05-03 15:12:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:08,038 INFO L480 AbstractCegarLoop]: Abstraction has 1278 states and 4513 transitions. [2021-05-03 15:12:08,038 INFO L481 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) [2021-05-03 15:12:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4513 transitions. [2021-05-03 15:12:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:08,040 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:08,040 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:08,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 15:12:08,245 INFO L428 AbstractCegarLoop]: === Iteration 73 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash -112435639, now seen corresponding path program 38 times [2021-05-03 15:12:08,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:08,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504140636] [2021-05-03 15:12:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:12:08,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504140636] [2021-05-03 15:12:08,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450930304] [2021-05-03 15:12:08,267 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) [2021-05-03 15:12:08,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:08,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:08,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:08,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:08,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 15:12:08,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241042277] [2021-05-03 15:12:08,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:08,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:08,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:08,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:08,367 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) [2021-05-03 15:12:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:08,552 INFO L93 Difference]: Finished difference Result 1841 states and 5998 transitions. [2021-05-03 15:12:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:12:08,552 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 [2021-05-03 15:12:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:08,557 INFO L225 Difference]: With dead ends: 1841 [2021-05-03 15:12:08,557 INFO L226 Difference]: Without dead ends: 1832 [2021-05-03 15:12:08,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:12:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-05-03 15:12:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1224. [2021-05-03 15:12:08,581 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) [2021-05-03 15:12:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4272 transitions. [2021-05-03 15:12:08,584 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4272 transitions. Word has length 22 [2021-05-03 15:12:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:08,584 INFO L480 AbstractCegarLoop]: Abstraction has 1224 states and 4272 transitions. [2021-05-03 15:12:08,584 INFO L481 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) [2021-05-03 15:12:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4272 transitions. [2021-05-03 15:12:08,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:08,587 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:08,587 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:08,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:08,801 INFO L428 AbstractCegarLoop]: === Iteration 74 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:08,801 INFO L82 PathProgramCache]: Analyzing trace with hash 38049097, now seen corresponding path program 39 times [2021-05-03 15:12:08,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:08,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919851416] [2021-05-03 15:12:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:08,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919851416] [2021-05-03 15:12:08,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262448605] [2021-05-03 15:12:08,833 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 [2021-05-03 15:12:08,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:08,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:08,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:08,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:08,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:08,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 15:12:08,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890689810] [2021-05-03 15:12:08,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:12:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:12:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:12:08,926 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) [2021-05-03 15:12:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:09,122 INFO L93 Difference]: Finished difference Result 1811 states and 5904 transitions. [2021-05-03 15:12:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:12:09,123 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 [2021-05-03 15:12:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:09,126 INFO L225 Difference]: With dead ends: 1811 [2021-05-03 15:12:09,126 INFO L226 Difference]: Without dead ends: 1799 [2021-05-03 15:12:09,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:12:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-05-03 15:12:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1222. [2021-05-03 15:12:09,166 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) [2021-05-03 15:12:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4265 transitions. [2021-05-03 15:12:09,169 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4265 transitions. Word has length 22 [2021-05-03 15:12:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:09,169 INFO L480 AbstractCegarLoop]: Abstraction has 1222 states and 4265 transitions. [2021-05-03 15:12:09,170 INFO L481 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) [2021-05-03 15:12:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4265 transitions. [2021-05-03 15:12:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:09,172 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:09,172 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:09,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 15:12:09,386 INFO L428 AbstractCegarLoop]: === Iteration 75 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:09,387 INFO L82 PathProgramCache]: Analyzing trace with hash 414299473, now seen corresponding path program 40 times [2021-05-03 15:12:09,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:09,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427345360] [2021-05-03 15:12:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:09,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427345360] [2021-05-03 15:12:09,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273414922] [2021-05-03 15:12:09,410 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 [2021-05-03 15:12:09,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:09,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:09,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:09,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:09,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:09,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833877672] [2021-05-03 15:12:09,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:09,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:09,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:09,502 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) [2021-05-03 15:12:09,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:09,626 INFO L93 Difference]: Finished difference Result 2184 states and 7117 transitions. [2021-05-03 15:12:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:12:09,626 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 [2021-05-03 15:12:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:09,629 INFO L225 Difference]: With dead ends: 2184 [2021-05-03 15:12:09,629 INFO L226 Difference]: Without dead ends: 2184 [2021-05-03 15:12:09,629 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:12:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-05-03 15:12:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1282. [2021-05-03 15:12:09,646 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) [2021-05-03 15:12:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4519 transitions. [2021-05-03 15:12:09,648 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4519 transitions. Word has length 22 [2021-05-03 15:12:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:09,648 INFO L480 AbstractCegarLoop]: Abstraction has 1282 states and 4519 transitions. [2021-05-03 15:12:09,648 INFO L481 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) [2021-05-03 15:12:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4519 transitions. [2021-05-03 15:12:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:09,650 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:09,650 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:09,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:09,851 INFO L428 AbstractCegarLoop]: === Iteration 76 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash -254499376, now seen corresponding path program 41 times [2021-05-03 15:12:09,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:09,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634670335] [2021-05-03 15:12:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:09,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634670335] [2021-05-03 15:12:09,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120749135] [2021-05-03 15:12:09,875 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:09,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:09,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:09,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:09,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:09,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:09,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125300519] [2021-05-03 15:12:09,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:09,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:09,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:09,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:09,968 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) [2021-05-03 15:12:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:10,192 INFO L93 Difference]: Finished difference Result 1724 states and 5684 transitions. [2021-05-03 15:12:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:12:10,192 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 [2021-05-03 15:12:10,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:10,196 INFO L225 Difference]: With dead ends: 1724 [2021-05-03 15:12:10,196 INFO L226 Difference]: Without dead ends: 1690 [2021-05-03 15:12:10,196 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-05-03 15:12:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1281. [2021-05-03 15:12:10,220 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) [2021-05-03 15:12:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4499 transitions. [2021-05-03 15:12:10,223 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4499 transitions. Word has length 22 [2021-05-03 15:12:10,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:10,223 INFO L480 AbstractCegarLoop]: Abstraction has 1281 states and 4499 transitions. [2021-05-03 15:12:10,223 INFO L481 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) [2021-05-03 15:12:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4499 transitions. [2021-05-03 15:12:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:10,226 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:10,226 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:10,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 15:12:10,447 INFO L428 AbstractCegarLoop]: === Iteration 77 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash -811023835, now seen corresponding path program 42 times [2021-05-03 15:12:10,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:10,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595410302] [2021-05-03 15:12:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:10,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595410302] [2021-05-03 15:12:10,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705876471] [2021-05-03 15:12:10,472 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 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 [2021-05-03 15:12:10,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:12:10,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:10,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:10,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:10,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:10,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:10,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321264409] [2021-05-03 15:12:10,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:10,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:10,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:10,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:10,553 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) [2021-05-03 15:12:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:10,752 INFO L93 Difference]: Finished difference Result 2125 states and 6947 transitions. [2021-05-03 15:12:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:12:10,753 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 [2021-05-03 15:12:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:10,756 INFO L225 Difference]: With dead ends: 2125 [2021-05-03 15:12:10,756 INFO L226 Difference]: Without dead ends: 2116 [2021-05-03 15:12:10,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:12:10,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-05-03 15:12:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1245. [2021-05-03 15:12:10,780 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) [2021-05-03 15:12:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4336 transitions. [2021-05-03 15:12:10,783 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4336 transitions. Word has length 22 [2021-05-03 15:12:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:10,783 INFO L480 AbstractCegarLoop]: Abstraction has 1245 states and 4336 transitions. [2021-05-03 15:12:10,783 INFO L481 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) [2021-05-03 15:12:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4336 transitions. [2021-05-03 15:12:10,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:10,786 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:10,786 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:11,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-03 15:12:11,001 INFO L428 AbstractCegarLoop]: === Iteration 78 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1183450264, now seen corresponding path program 43 times [2021-05-03 15:12:11,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:11,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301495113] [2021-05-03 15:12:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:11,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301495113] [2021-05-03 15:12:11,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335479685] [2021-05-03 15:12:11,021 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 [2021-05-03 15:12:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:11,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:11,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:11,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:11,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858083942] [2021-05-03 15:12:11,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:11,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:11,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:11,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:11,088 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) [2021-05-03 15:12:11,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:11,210 INFO L93 Difference]: Finished difference Result 1497 states and 4889 transitions. [2021-05-03 15:12:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:12:11,210 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 [2021-05-03 15:12:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:11,212 INFO L225 Difference]: With dead ends: 1497 [2021-05-03 15:12:11,212 INFO L226 Difference]: Without dead ends: 1497 [2021-05-03 15:12:11,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:12:11,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-05-03 15:12:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1200. [2021-05-03 15:12:11,227 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) [2021-05-03 15:12:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4117 transitions. [2021-05-03 15:12:11,229 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4117 transitions. Word has length 22 [2021-05-03 15:12:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:11,229 INFO L480 AbstractCegarLoop]: Abstraction has 1200 states and 4117 transitions. [2021-05-03 15:12:11,229 INFO L481 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) [2021-05-03 15:12:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4117 transitions. [2021-05-03 15:12:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:11,231 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:11,231 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:11,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:11,432 INFO L428 AbstractCegarLoop]: === Iteration 79 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:11,432 INFO L82 PathProgramCache]: Analyzing trace with hash -496279263, now seen corresponding path program 44 times [2021-05-03 15:12:11,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:11,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343901060] [2021-05-03 15:12:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:11,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343901060] [2021-05-03 15:12:11,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133951080] [2021-05-03 15:12:11,452 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) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:11,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:11,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:11,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:11,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:11,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:11,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 15:12:11,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602408230] [2021-05-03 15:12:11,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:11,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:11,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:11,520 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) [2021-05-03 15:12:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:11,657 INFO L93 Difference]: Finished difference Result 1698 states and 5519 transitions. [2021-05-03 15:12:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:12:11,657 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 [2021-05-03 15:12:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:11,660 INFO L225 Difference]: With dead ends: 1698 [2021-05-03 15:12:11,660 INFO L226 Difference]: Without dead ends: 1690 [2021-05-03 15:12:11,660 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:12:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-05-03 15:12:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1200. [2021-05-03 15:12:11,679 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) [2021-05-03 15:12:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4111 transitions. [2021-05-03 15:12:11,682 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4111 transitions. Word has length 22 [2021-05-03 15:12:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:11,682 INFO L480 AbstractCegarLoop]: Abstraction has 1200 states and 4111 transitions. [2021-05-03 15:12:11,682 INFO L481 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) [2021-05-03 15:12:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4111 transitions. [2021-05-03 15:12:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:11,684 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:11,684 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:11,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:11,901 INFO L428 AbstractCegarLoop]: === Iteration 80 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1029973939, now seen corresponding path program 45 times [2021-05-03 15:12:11,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:11,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198338015] [2021-05-03 15:12:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:11,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198338015] [2021-05-03 15:12:11,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551770546] [2021-05-03 15:12:11,925 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) [2021-05-03 15:12:11,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:11,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:12,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:12,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 15:12:12,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942919251] [2021-05-03 15:12:12,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:12:12,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:12,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:12:12,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:12:12,017 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) [2021-05-03 15:12:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:12,103 INFO L93 Difference]: Finished difference Result 1428 states and 4807 transitions. [2021-05-03 15:12:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:12:12,104 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 [2021-05-03 15:12:12,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:12,107 INFO L225 Difference]: With dead ends: 1428 [2021-05-03 15:12:12,107 INFO L226 Difference]: Without dead ends: 1419 [2021-05-03 15:12:12,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:12:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-05-03 15:12:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1199. [2021-05-03 15:12:12,127 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) [2021-05-03 15:12:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 4109 transitions. [2021-05-03 15:12:12,130 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 4109 transitions. Word has length 22 [2021-05-03 15:12:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:12,130 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 4109 transitions. [2021-05-03 15:12:12,130 INFO L481 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) [2021-05-03 15:12:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 4109 transitions. [2021-05-03 15:12:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:12:12,133 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:12,133 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:12,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-03 15:12:12,355 INFO L428 AbstractCegarLoop]: === Iteration 81 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:12,355 INFO L82 PathProgramCache]: Analyzing trace with hash -736606674, now seen corresponding path program 46 times [2021-05-03 15:12:12,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:12,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277176479] [2021-05-03 15:12:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:12,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277176479] [2021-05-03 15:12:12,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341810108] [2021-05-03 15:12:12,381 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) [2021-05-03 15:12:12,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:12,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:12,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:12,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:12,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:12,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 15:12:12,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902273095] [2021-05-03 15:12:12,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:12:12,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:12:12,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:12:12,458 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) [2021-05-03 15:12:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:12,526 INFO L93 Difference]: Finished difference Result 1470 states and 4948 transitions. [2021-05-03 15:12:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:12:12,527 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 [2021-05-03 15:12:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:12,529 INFO L225 Difference]: With dead ends: 1470 [2021-05-03 15:12:12,529 INFO L226 Difference]: Without dead ends: 1470 [2021-05-03 15:12:12,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:12:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-05-03 15:12:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1208. [2021-05-03 15:12:12,543 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) [2021-05-03 15:12:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4143 transitions. [2021-05-03 15:12:12,546 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4143 transitions. Word has length 22 [2021-05-03 15:12:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:12,546 INFO L480 AbstractCegarLoop]: Abstraction has 1208 states and 4143 transitions. [2021-05-03 15:12:12,546 INFO L481 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) [2021-05-03 15:12:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4143 transitions. [2021-05-03 15:12:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:12,547 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:12,548 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:12,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-03 15:12:12,748 INFO L428 AbstractCegarLoop]: === Iteration 82 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash -834579384, now seen corresponding path program 47 times [2021-05-03 15:12:12,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:12,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457876300] [2021-05-03 15:12:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:12,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457876300] [2021-05-03 15:12:12,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862110829] [2021-05-03 15:12:12,986 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 [2021-05-03 15:12:13,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:13,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:13,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:13,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:13,176 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 [2021-05-03 15:12:13,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:13,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:13,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:13,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-05-03 15:12:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:13,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:13,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:12:13,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401752967] [2021-05-03 15:12:13,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:13,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:13,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:13,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:13,208 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) [2021-05-03 15:12:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:16,844 INFO L93 Difference]: Finished difference Result 4448 states and 15165 transitions. [2021-05-03 15:12:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-03 15:12:16,844 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 [2021-05-03 15:12:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:16,851 INFO L225 Difference]: With dead ends: 4448 [2021-05-03 15:12:16,851 INFO L226 Difference]: Without dead ends: 4426 [2021-05-03 15:12:16,852 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2881.7ms TimeCoverageRelationStatistics Valid=1022, Invalid=5620, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 15:12:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-05-03 15:12:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 1303. [2021-05-03 15:12:16,878 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) [2021-05-03 15:12:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4479 transitions. [2021-05-03 15:12:16,881 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4479 transitions. Word has length 24 [2021-05-03 15:12:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:16,881 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4479 transitions. [2021-05-03 15:12:16,881 INFO L481 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) [2021-05-03 15:12:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4479 transitions. [2021-05-03 15:12:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:16,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:16,883 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:17,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-03 15:12:17,083 INFO L428 AbstractCegarLoop]: === Iteration 83 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash 965720304, now seen corresponding path program 48 times [2021-05-03 15:12:17,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:17,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645068169] [2021-05-03 15:12:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:17,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645068169] [2021-05-03 15:12:17,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839859427] [2021-05-03 15:12:17,312 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 [2021-05-03 15:12:17,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:12:17,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 15:12:17,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:17,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:17,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:17,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:17,619 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 [2021-05-03 15:12:17,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:17,681 INFO L628 ElimStorePlain]: treesize reduction 48, result has 42.9 percent of original size [2021-05-03 15:12:17,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:17,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-05-03 15:12:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:17,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:17,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-05-03 15:12:17,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933336707] [2021-05-03 15:12:17,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:12:17,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:17,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:12:17,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:12:17,812 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) [2021-05-03 15:12:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:20,851 INFO L93 Difference]: Finished difference Result 2829 states and 9372 transitions. [2021-05-03 15:12:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 15:12:20,852 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 [2021-05-03 15:12:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:20,857 INFO L225 Difference]: With dead ends: 2829 [2021-05-03 15:12:20,858 INFO L226 Difference]: Without dead ends: 2799 [2021-05-03 15:12:20,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2589.1ms TimeCoverageRelationStatistics Valid=661, Invalid=3121, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 15:12:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-05-03 15:12:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1316. [2021-05-03 15:12:20,887 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) [2021-05-03 15:12:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4524 transitions. [2021-05-03 15:12:20,891 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4524 transitions. Word has length 24 [2021-05-03 15:12:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:20,891 INFO L480 AbstractCegarLoop]: Abstraction has 1316 states and 4524 transitions. [2021-05-03 15:12:20,891 INFO L481 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) [2021-05-03 15:12:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4524 transitions. [2021-05-03 15:12:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:20,893 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:20,893 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:21,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 15:12:21,105 INFO L428 AbstractCegarLoop]: === Iteration 84 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1186871304, now seen corresponding path program 49 times [2021-05-03 15:12:21,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:21,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791863595] [2021-05-03 15:12:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:21,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791863595] [2021-05-03 15:12:21,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927557539] [2021-05-03 15:12:21,352 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) [2021-05-03 15:12:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:21,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:21,605 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 [2021-05-03 15:12:21,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:21,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:21,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:21,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-05-03 15:12:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:21,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:21,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:12:21,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773727020] [2021-05-03 15:12:21,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:21,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:21,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:21,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:21,649 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) [2021-05-03 15:12:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:23,605 INFO L93 Difference]: Finished difference Result 2754 states and 9152 transitions. [2021-05-03 15:12:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 15:12:23,606 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 [2021-05-03 15:12:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:23,610 INFO L225 Difference]: With dead ends: 2754 [2021-05-03 15:12:23,610 INFO L226 Difference]: Without dead ends: 2720 [2021-05-03 15:12:23,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1494.2ms TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:12:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-05-03 15:12:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1330. [2021-05-03 15:12:23,632 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) [2021-05-03 15:12:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4576 transitions. [2021-05-03 15:12:23,635 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4576 transitions. Word has length 24 [2021-05-03 15:12:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:23,635 INFO L480 AbstractCegarLoop]: Abstraction has 1330 states and 4576 transitions. [2021-05-03 15:12:23,635 INFO L481 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) [2021-05-03 15:12:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4576 transitions. [2021-05-03 15:12:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:23,637 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:23,637 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:23,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-03 15:12:23,849 INFO L428 AbstractCegarLoop]: === Iteration 85 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:23,850 INFO L82 PathProgramCache]: Analyzing trace with hash 749372208, now seen corresponding path program 50 times [2021-05-03 15:12:23,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:23,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366715555] [2021-05-03 15:12:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:24,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366715555] [2021-05-03 15:12:24,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81221024] [2021-05-03 15:12:24,103 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 [2021-05-03 15:12:24,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 15:12:24,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:24,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:24,336 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 [2021-05-03 15:12:24,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:24,380 INFO L628 ElimStorePlain]: treesize reduction 29, result has 50.8 percent of original size [2021-05-03 15:12:24,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:24,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:32 [2021-05-03 15:12:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:24,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:24,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-03 15:12:24,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117018838] [2021-05-03 15:12:24,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:12:24,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:12:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:12:24,462 INFO L87 Difference]: Start difference. First operand 1330 states and 4576 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) [2021-05-03 15:12:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:26,378 INFO L93 Difference]: Finished difference Result 2600 states and 8701 transitions. [2021-05-03 15:12:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 15:12:26,379 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 [2021-05-03 15:12:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:26,383 INFO L225 Difference]: With dead ends: 2600 [2021-05-03 15:12:26,383 INFO L226 Difference]: Without dead ends: 2578 [2021-05-03 15:12:26,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1515.1ms TimeCoverageRelationStatistics Valid=457, Invalid=2299, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 15:12:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-05-03 15:12:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1330. [2021-05-03 15:12:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.44920993227991) internal successors, (4584), 1329 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4584 transitions. [2021-05-03 15:12:26,407 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4584 transitions. Word has length 24 [2021-05-03 15:12:26,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:26,407 INFO L480 AbstractCegarLoop]: Abstraction has 1330 states and 4584 transitions. [2021-05-03 15:12:26,407 INFO L481 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) [2021-05-03 15:12:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4584 transitions. [2021-05-03 15:12:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:26,410 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:26,410 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:26,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:26,610 INFO L428 AbstractCegarLoop]: === Iteration 86 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:26,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:26,611 INFO L82 PathProgramCache]: Analyzing trace with hash 572830776, now seen corresponding path program 51 times [2021-05-03 15:12:26,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:26,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606646025] [2021-05-03 15:12:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:26,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606646025] [2021-05-03 15:12:26,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632595521] [2021-05-03 15:12:26,839 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 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 [2021-05-03 15:12:26,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:12:26,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:26,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:26,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:27,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:27,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:27,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:27,047 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 [2021-05-03 15:12:27,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:27,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:27,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:27,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-05-03 15:12:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:27,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:27,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-03 15:12:27,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910202973] [2021-05-03 15:12:27,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:12:27,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:27,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:12:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:12:27,279 INFO L87 Difference]: Start difference. First operand 1330 states and 4584 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) [2021-05-03 15:12:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:29,311 INFO L93 Difference]: Finished difference Result 2457 states and 8209 transitions. [2021-05-03 15:12:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 15:12:29,312 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 [2021-05-03 15:12:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:29,316 INFO L225 Difference]: With dead ends: 2457 [2021-05-03 15:12:29,316 INFO L226 Difference]: Without dead ends: 2437 [2021-05-03 15:12:29,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1753.1ms TimeCoverageRelationStatistics Valid=478, Invalid=2602, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 15:12:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-05-03 15:12:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1338. [2021-05-03 15:12:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.442782348541511) internal successors, (4603), 1337 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4603 transitions. [2021-05-03 15:12:29,339 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4603 transitions. Word has length 24 [2021-05-03 15:12:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:29,339 INFO L480 AbstractCegarLoop]: Abstraction has 1338 states and 4603 transitions. [2021-05-03 15:12:29,339 INFO L481 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) [2021-05-03 15:12:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4603 transitions. [2021-05-03 15:12:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:29,342 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:29,342 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:29,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-03 15:12:29,542 INFO L428 AbstractCegarLoop]: === Iteration 87 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash -260907664, now seen corresponding path program 52 times [2021-05-03 15:12:29,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:29,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827242740] [2021-05-03 15:12:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:29,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827242740] [2021-05-03 15:12:29,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38212958] [2021-05-03 15:12:29,771 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 [2021-05-03 15:12:29,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:29,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:29,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:29,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:29,937 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 [2021-05-03 15:12:29,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:29,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:29,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:29,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-05-03 15:12:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:30,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:30,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-05-03 15:12:30,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600977460] [2021-05-03 15:12:30,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:12:30,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:12:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:30,031 INFO L87 Difference]: Start difference. First operand 1338 states and 4603 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) [2021-05-03 15:12:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:31,071 INFO L93 Difference]: Finished difference Result 2445 states and 8230 transitions. [2021-05-03 15:12:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:12:31,072 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 [2021-05-03 15:12:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:31,076 INFO L225 Difference]: With dead ends: 2445 [2021-05-03 15:12:31,076 INFO L226 Difference]: Without dead ends: 2434 [2021-05-03 15:12:31,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 943.2ms TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:12:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-05-03 15:12:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1337. [2021-05-03 15:12:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.447604790419162) internal successors, (4606), 1336 states have internal predecessors, (4606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4606 transitions. [2021-05-03 15:12:31,099 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4606 transitions. Word has length 24 [2021-05-03 15:12:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:31,100 INFO L480 AbstractCegarLoop]: Abstraction has 1337 states and 4606 transitions. [2021-05-03 15:12:31,100 INFO L481 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) [2021-05-03 15:12:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4606 transitions. [2021-05-03 15:12:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:31,102 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:31,102 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:31,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:31,302 INFO L428 AbstractCegarLoop]: === Iteration 88 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:31,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1760921938, now seen corresponding path program 1 times [2021-05-03 15:12:31,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:31,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471145265] [2021-05-03 15:12:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:31,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471145265] [2021-05-03 15:12:31,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118986889] [2021-05-03 15:12:31,541 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 [2021-05-03 15:12:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:31,747 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 [2021-05-03 15:12:31,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:31,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:31,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:31,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-05-03 15:12:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:31,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:31,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:12:31,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241050622] [2021-05-03 15:12:31,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:31,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:31,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:31,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:31,784 INFO L87 Difference]: Start difference. First operand 1337 states and 4606 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) [2021-05-03 15:12:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:35,425 INFO L93 Difference]: Finished difference Result 3789 states and 12976 transitions. [2021-05-03 15:12:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 15:12:35,426 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 [2021-05-03 15:12:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:35,432 INFO L225 Difference]: With dead ends: 3789 [2021-05-03 15:12:35,433 INFO L226 Difference]: Without dead ends: 3770 [2021-05-03 15:12:35,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2788.0ms TimeCoverageRelationStatistics Valid=761, Invalid=4351, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 15:12:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-05-03 15:12:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 1372. [2021-05-03 15:12:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.4566010211524434) internal successors, (4739), 1371 states have internal predecessors, (4739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4739 transitions. [2021-05-03 15:12:35,464 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4739 transitions. Word has length 24 [2021-05-03 15:12:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:35,464 INFO L480 AbstractCegarLoop]: Abstraction has 1372 states and 4739 transitions. [2021-05-03 15:12:35,464 INFO L481 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) [2021-05-03 15:12:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4739 transitions. [2021-05-03 15:12:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:35,466 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:35,466 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:35,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-03 15:12:35,667 INFO L428 AbstractCegarLoop]: === Iteration 89 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:35,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1251406074, now seen corresponding path program 2 times [2021-05-03 15:12:35,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:35,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286269535] [2021-05-03 15:12:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:35,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286269535] [2021-05-03 15:12:35,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667071733] [2021-05-03 15:12:35,868 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 [2021-05-03 15:12:35,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:35,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:12:35,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:36,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:36,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:12:36,213 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:12:36,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:36,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:36,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:36,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 15:12:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:36,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:36,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-03 15:12:36,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611775927] [2021-05-03 15:12:36,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:12:36,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:12:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:12:36,269 INFO L87 Difference]: Start difference. First operand 1372 states and 4739 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) [2021-05-03 15:12:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:38,210 INFO L93 Difference]: Finished difference Result 2341 states and 7957 transitions. [2021-05-03 15:12:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 15:12:38,211 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 [2021-05-03 15:12:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:38,215 INFO L225 Difference]: With dead ends: 2341 [2021-05-03 15:12:38,215 INFO L226 Difference]: Without dead ends: 2332 [2021-05-03 15:12:38,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1504.5ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:12:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-05-03 15:12:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1382. [2021-05-03 15:12:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1382 states, 1381 states have (on average 3.4576393917451123) internal successors, (4775), 1381 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 4775 transitions. [2021-05-03 15:12:38,235 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 4775 transitions. Word has length 24 [2021-05-03 15:12:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:38,235 INFO L480 AbstractCegarLoop]: Abstraction has 1382 states and 4775 transitions. [2021-05-03 15:12:38,235 INFO L481 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) [2021-05-03 15:12:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 4775 transitions. [2021-05-03 15:12:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:38,237 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:38,237 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:38,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-03 15:12:38,438 INFO L428 AbstractCegarLoop]: === Iteration 90 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:38,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1041868694, now seen corresponding path program 3 times [2021-05-03 15:12:38,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:38,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827758152] [2021-05-03 15:12:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:38,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827758152] [2021-05-03 15:12:38,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84573131] [2021-05-03 15:12:38,683 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 [2021-05-03 15:12:38,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:38,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:38,888 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 [2021-05-03 15:12:38,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:38,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:38,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:38,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-05-03 15:12:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:38,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:38,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:12:38,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787661727] [2021-05-03 15:12:38,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:38,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:38,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:38,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:38,935 INFO L87 Difference]: Start difference. First operand 1382 states and 4775 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) [2021-05-03 15:12:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:40,802 INFO L93 Difference]: Finished difference Result 2522 states and 8473 transitions. [2021-05-03 15:12:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:12:40,803 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 [2021-05-03 15:12:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:40,807 INFO L225 Difference]: With dead ends: 2522 [2021-05-03 15:12:40,807 INFO L226 Difference]: Without dead ends: 2493 [2021-05-03 15:12:40,807 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1375.1ms TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 15:12:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-05-03 15:12:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 1392. [2021-05-03 15:12:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.460819554277498) internal successors, (4814), 1391 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4814 transitions. [2021-05-03 15:12:40,830 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4814 transitions. Word has length 24 [2021-05-03 15:12:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:40,830 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4814 transitions. [2021-05-03 15:12:40,830 INFO L481 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) [2021-05-03 15:12:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4814 transitions. [2021-05-03 15:12:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:40,832 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:40,832 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:41,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-03 15:12:41,049 INFO L428 AbstractCegarLoop]: === Iteration 91 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:41,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:41,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1524426856, now seen corresponding path program 4 times [2021-05-03 15:12:41,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:41,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647443474] [2021-05-03 15:12:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:41,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647443474] [2021-05-03 15:12:41,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755647543] [2021-05-03 15:12:41,287 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 [2021-05-03 15:12:41,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:41,471 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 20 treesize of output 12 [2021-05-03 15:12:41,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:41,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:41,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:41,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-05-03 15:12:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:41,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:41,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:12:41,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437082783] [2021-05-03 15:12:41,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:41,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:41,506 INFO L87 Difference]: Start difference. First operand 1392 states and 4814 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) [2021-05-03 15:12:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:43,239 INFO L93 Difference]: Finished difference Result 2457 states and 8279 transitions. [2021-05-03 15:12:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:12:43,239 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 [2021-05-03 15:12:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:43,244 INFO L225 Difference]: With dead ends: 2457 [2021-05-03 15:12:43,244 INFO L226 Difference]: Without dead ends: 2428 [2021-05-03 15:12:43,244 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1299.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 15:12:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-05-03 15:12:43,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1386. [2021-05-03 15:12:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4649819494584837) internal successors, (4799), 1385 states have internal predecessors, (4799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4799 transitions. [2021-05-03 15:12:43,265 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4799 transitions. Word has length 24 [2021-05-03 15:12:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:43,266 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4799 transitions. [2021-05-03 15:12:43,266 INFO L481 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) [2021-05-03 15:12:43,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4799 transitions. [2021-05-03 15:12:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:43,268 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:43,268 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:43,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:43,468 INFO L428 AbstractCegarLoop]: === Iteration 92 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1742390580, now seen corresponding path program 5 times [2021-05-03 15:12:43,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:43,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007482496] [2021-05-03 15:12:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:43,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007482496] [2021-05-03 15:12:43,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538063346] [2021-05-03 15:12:43,682 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 [2021-05-03 15:12:43,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:43,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:43,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:43,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:43,830 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 [2021-05-03 15:12:43,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:43,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:43,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:43,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-05-03 15:12:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:43,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:43,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-05-03 15:12:43,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287554611] [2021-05-03 15:12:43,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:12:43,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:43,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:12:43,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:43,884 INFO L87 Difference]: Start difference. First operand 1386 states and 4799 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) [2021-05-03 15:12:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:44,952 INFO L93 Difference]: Finished difference Result 2282 states and 7774 transitions. [2021-05-03 15:12:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:12:44,952 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 [2021-05-03 15:12:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:44,957 INFO L225 Difference]: With dead ends: 2282 [2021-05-03 15:12:44,957 INFO L226 Difference]: Without dead ends: 2273 [2021-05-03 15:12:44,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 730.8ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:12:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-05-03 15:12:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1399. [2021-05-03 15:12:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.46137339055794) internal successors, (4839), 1398 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4839 transitions. [2021-05-03 15:12:44,981 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4839 transitions. Word has length 24 [2021-05-03 15:12:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:44,981 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 4839 transitions. [2021-05-03 15:12:44,981 INFO L481 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) [2021-05-03 15:12:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4839 transitions. [2021-05-03 15:12:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:44,984 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:44,984 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:45,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-03 15:12:45,184 INFO L428 AbstractCegarLoop]: === Iteration 93 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:45,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2065976758, now seen corresponding path program 6 times [2021-05-03 15:12:45,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:45,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748907010] [2021-05-03 15:12:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:45,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748907010] [2021-05-03 15:12:45,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094181357] [2021-05-03 15:12:45,424 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 [2021-05-03 15:12:45,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:12:45,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:45,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:12:45,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:45,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:45,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:45,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:45,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:45,687 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 [2021-05-03 15:12:45,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:45,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:45,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:45,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-05-03 15:12:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:45,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:45,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-03 15:12:45,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846665109] [2021-05-03 15:12:45,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:12:45,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:45,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:12:45,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:12:45,917 INFO L87 Difference]: Start difference. First operand 1399 states and 4839 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) [2021-05-03 15:12:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:48,151 INFO L93 Difference]: Finished difference Result 2270 states and 7714 transitions. [2021-05-03 15:12:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 15:12:48,151 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 [2021-05-03 15:12:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:48,155 INFO L225 Difference]: With dead ends: 2270 [2021-05-03 15:12:48,155 INFO L226 Difference]: Without dead ends: 2261 [2021-05-03 15:12:48,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2102.3ms TimeCoverageRelationStatistics Valid=540, Invalid=2322, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 15:12:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-05-03 15:12:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1402. [2021-05-03 15:12:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.4632405424696646) internal successors, (4852), 1401 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4852 transitions. [2021-05-03 15:12:48,177 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4852 transitions. Word has length 24 [2021-05-03 15:12:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:48,177 INFO L480 AbstractCegarLoop]: Abstraction has 1402 states and 4852 transitions. [2021-05-03 15:12:48,177 INFO L481 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) [2021-05-03 15:12:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4852 transitions. [2021-05-03 15:12:48,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:48,179 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:48,179 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:48,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:48,380 INFO L428 AbstractCegarLoop]: === Iteration 94 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:48,393 INFO L82 PathProgramCache]: Analyzing trace with hash -543246416, now seen corresponding path program 7 times [2021-05-03 15:12:48,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:48,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544303141] [2021-05-03 15:12:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:48,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544303141] [2021-05-03 15:12:48,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319769780] [2021-05-03 15:12:48,599 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 [2021-05-03 15:12:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:48,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:48,763 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 [2021-05-03 15:12:48,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:48,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:48,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:48,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-05-03 15:12:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:48,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:48,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-05-03 15:12:48,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203360156] [2021-05-03 15:12:48,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:12:48,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:12:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:12:48,820 INFO L87 Difference]: Start difference. First operand 1402 states and 4852 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) [2021-05-03 15:12:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:49,853 INFO L93 Difference]: Finished difference Result 2225 states and 7584 transitions. [2021-05-03 15:12:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:12:49,853 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 [2021-05-03 15:12:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:49,857 INFO L225 Difference]: With dead ends: 2225 [2021-05-03 15:12:49,857 INFO L226 Difference]: Without dead ends: 2214 [2021-05-03 15:12:49,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 749.6ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:12:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-05-03 15:12:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1394. [2021-05-03 15:12:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.464465183058148) internal successors, (4826), 1393 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4826 transitions. [2021-05-03 15:12:49,877 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4826 transitions. Word has length 24 [2021-05-03 15:12:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:49,877 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 4826 transitions. [2021-05-03 15:12:49,877 INFO L481 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) [2021-05-03 15:12:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4826 transitions. [2021-05-03 15:12:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:49,879 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:49,879 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:50,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-03 15:12:50,079 INFO L428 AbstractCegarLoop]: === Iteration 95 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:50,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1059751936, now seen corresponding path program 53 times [2021-05-03 15:12:50,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:50,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558905390] [2021-05-03 15:12:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:50,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558905390] [2021-05-03 15:12:50,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177858391] [2021-05-03 15:12:50,337 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 [2021-05-03 15:12:50,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:50,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:50,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:50,567 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 [2021-05-03 15:12:50,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:50,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:50,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:50,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-05-03 15:12:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:50,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:50,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:12:50,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911143501] [2021-05-03 15:12:50,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:50,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:50,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:50,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:50,605 INFO L87 Difference]: Start difference. First operand 1394 states and 4826 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) [2021-05-03 15:12:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:52,011 INFO L93 Difference]: Finished difference Result 2264 states and 7631 transitions. [2021-05-03 15:12:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 15:12:52,011 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 [2021-05-03 15:12:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:52,015 INFO L225 Difference]: With dead ends: 2264 [2021-05-03 15:12:52,015 INFO L226 Difference]: Without dead ends: 2254 [2021-05-03 15:12:52,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 962.5ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:12:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-05-03 15:12:52,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1396. [2021-05-03 15:12:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 3.4637992831541218) internal successors, (4832), 1395 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4832 transitions. [2021-05-03 15:12:52,045 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4832 transitions. Word has length 24 [2021-05-03 15:12:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:52,045 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 4832 transitions. [2021-05-03 15:12:52,045 INFO L481 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) [2021-05-03 15:12:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4832 transitions. [2021-05-03 15:12:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:52,048 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:52,048 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:52,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-03 15:12:52,269 INFO L428 AbstractCegarLoop]: === Iteration 96 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:52,270 INFO L82 PathProgramCache]: Analyzing trace with hash -448330122, now seen corresponding path program 54 times [2021-05-03 15:12:52,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:52,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906061415] [2021-05-03 15:12:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:52,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906061415] [2021-05-03 15:12:52,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099501533] [2021-05-03 15:12:52,524 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 [2021-05-03 15:12:52,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:12:52,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:52,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:52,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:52,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:52,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:52,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:52,879 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 [2021-05-03 15:12:52,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:52,920 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-05-03 15:12:52,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:52,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-05-03 15:12:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:53,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:53,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-03 15:12:53,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27287268] [2021-05-03 15:12:53,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:12:53,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:12:53,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:12:53,014 INFO L87 Difference]: Start difference. First operand 1396 states and 4832 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) [2021-05-03 15:12:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:54,380 INFO L93 Difference]: Finished difference Result 2206 states and 7384 transitions. [2021-05-03 15:12:54,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:12:54,381 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 [2021-05-03 15:12:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:54,385 INFO L225 Difference]: With dead ends: 2206 [2021-05-03 15:12:54,385 INFO L226 Difference]: Without dead ends: 2174 [2021-05-03 15:12:54,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 976.3ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:12:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-05-03 15:12:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1408. [2021-05-03 15:12:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.4633972992181947) internal successors, (4873), 1407 states have internal predecessors, (4873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4873 transitions. [2021-05-03 15:12:54,409 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4873 transitions. Word has length 24 [2021-05-03 15:12:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:54,410 INFO L480 AbstractCegarLoop]: Abstraction has 1408 states and 4873 transitions. [2021-05-03 15:12:54,410 INFO L481 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) [2021-05-03 15:12:54,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4873 transitions. [2021-05-03 15:12:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:54,412 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:54,412 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:54,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 15:12:54,615 INFO L428 AbstractCegarLoop]: === Iteration 97 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:54,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1487913390, now seen corresponding path program 55 times [2021-05-03 15:12:54,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:54,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339846154] [2021-05-03 15:12:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:54,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339846154] [2021-05-03 15:12:54,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522174700] [2021-05-03 15:12:54,924 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 [2021-05-03 15:12:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:54,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:55,129 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 [2021-05-03 15:12:55,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:55,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:55,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:55,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-05-03 15:12:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:55,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:55,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:12:55,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734509790] [2021-05-03 15:12:55,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:55,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:55,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:55,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:55,169 INFO L87 Difference]: Start difference. First operand 1408 states and 4873 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) [2021-05-03 15:12:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:56,614 INFO L93 Difference]: Finished difference Result 2197 states and 7402 transitions. [2021-05-03 15:12:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:12:56,614 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 [2021-05-03 15:12:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:56,618 INFO L225 Difference]: With dead ends: 2197 [2021-05-03 15:12:56,618 INFO L226 Difference]: Without dead ends: 2175 [2021-05-03 15:12:56,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 999.2ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:12:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-05-03 15:12:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1410. [2021-05-03 15:12:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.4669978708303764) internal successors, (4885), 1409 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4885 transitions. [2021-05-03 15:12:56,640 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4885 transitions. Word has length 24 [2021-05-03 15:12:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:56,640 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 4885 transitions. [2021-05-03 15:12:56,640 INFO L481 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) [2021-05-03 15:12:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4885 transitions. [2021-05-03 15:12:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:56,642 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:56,643 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:56,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:56,843 INFO L428 AbstractCegarLoop]: === Iteration 98 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:56,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1311371958, now seen corresponding path program 56 times [2021-05-03 15:12:56,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:56,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710840299] [2021-05-03 15:12:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:57,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710840299] [2021-05-03 15:12:57,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775002293] [2021-05-03 15:12:57,044 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 [2021-05-03 15:12:57,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:57,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:12:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:57,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:57,230 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 [2021-05-03 15:12:57,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:57,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:57,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:57,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-05-03 15:12:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:57,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:57,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 15:12:57,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031426942] [2021-05-03 15:12:57,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:57,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:57,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:57,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:57,394 INFO L87 Difference]: Start difference. First operand 1410 states and 4885 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) [2021-05-03 15:12:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:58,663 INFO L93 Difference]: Finished difference Result 2128 states and 7175 transitions. [2021-05-03 15:12:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:12:58,665 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 [2021-05-03 15:12:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:58,669 INFO L225 Difference]: With dead ends: 2128 [2021-05-03 15:12:58,669 INFO L226 Difference]: Without dead ends: 2118 [2021-05-03 15:12:58,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 946.5ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:12:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-05-03 15:12:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1416. [2021-05-03 15:12:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.462897526501767) internal successors, (4900), 1415 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4900 transitions. [2021-05-03 15:12:58,691 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4900 transitions. Word has length 24 [2021-05-03 15:12:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:58,691 INFO L480 AbstractCegarLoop]: Abstraction has 1416 states and 4900 transitions. [2021-05-03 15:12:58,691 INFO L481 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) [2021-05-03 15:12:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4900 transitions. [2021-05-03 15:12:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:12:58,693 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:58,693 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:58,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:58,895 INFO L428 AbstractCegarLoop]: === Iteration 99 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:12:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:58,895 INFO L82 PathProgramCache]: Analyzing trace with hash 477633518, now seen corresponding path program 57 times [2021-05-03 15:12:58,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:58,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142463696] [2021-05-03 15:12:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:59,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142463696] [2021-05-03 15:12:59,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063471549] [2021-05-03 15:12:59,103 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 [2021-05-03 15:12:59,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:12:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 15:12:59,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:59,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:59,312 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 [2021-05-03 15:12:59,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:59,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:59,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:59,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:188 [2021-05-03 15:12:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:59,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:59,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 15:12:59,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086861631] [2021-05-03 15:12:59,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:59,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:59,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:59,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:59,619 INFO L87 Difference]: Start difference. First operand 1416 states and 4900 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) [2021-05-03 15:13:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:01,260 INFO L93 Difference]: Finished difference Result 2092 states and 7054 transitions. [2021-05-03 15:13:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:13:01,261 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 [2021-05-03 15:13:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:01,264 INFO L225 Difference]: With dead ends: 2092 [2021-05-03 15:13:01,264 INFO L226 Difference]: Without dead ends: 2080 [2021-05-03 15:13:01,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1209.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:13:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-05-03 15:13:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1414. [2021-05-03 15:13:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.4685067232837934) internal successors, (4901), 1413 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4901 transitions. [2021-05-03 15:13:01,303 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4901 transitions. Word has length 24 [2021-05-03 15:13:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:01,303 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4901 transitions. [2021-05-03 15:13:01,303 INFO L481 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) [2021-05-03 15:13:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4901 transitions. [2021-05-03 15:13:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:01,308 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:01,308 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:01,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:01,521 INFO L428 AbstractCegarLoop]: === Iteration 100 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:01,521 INFO L82 PathProgramCache]: Analyzing trace with hash -291281526, now seen corresponding path program 8 times [2021-05-03 15:13:01,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:01,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769637026] [2021-05-03 15:13:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:01,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769637026] [2021-05-03 15:13:01,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33417510] [2021-05-03 15:13:01,806 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:13:01,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:13:01,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:13:01,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:02,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:02,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:13:02,205 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 [2021-05-03 15:13:02,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:02,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:02,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:02,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 15:13:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:02,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:02,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-03 15:13:02,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430213076] [2021-05-03 15:13:02,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:02,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:02,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:02,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:02,257 INFO L87 Difference]: Start difference. First operand 1414 states and 4901 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) [2021-05-03 15:13:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:03,742 INFO L93 Difference]: Finished difference Result 2163 states and 7289 transitions. [2021-05-03 15:13:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:13:03,742 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 [2021-05-03 15:13:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:03,746 INFO L225 Difference]: With dead ends: 2163 [2021-05-03 15:13:03,747 INFO L226 Difference]: Without dead ends: 2154 [2021-05-03 15:13:03,747 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1070.4ms TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:13:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-05-03 15:13:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1414. [2021-05-03 15:13:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.4685067232837934) internal successors, (4901), 1413 states have internal predecessors, (4901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4901 transitions. [2021-05-03 15:13:03,773 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4901 transitions. Word has length 24 [2021-05-03 15:13:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:03,774 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4901 transitions. [2021-05-03 15:13:03,774 INFO L481 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) [2021-05-03 15:13:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4901 transitions. [2021-05-03 15:13:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:03,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:03,775 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:03,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:03,976 INFO L428 AbstractCegarLoop]: === Iteration 101 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -500818906, now seen corresponding path program 9 times [2021-05-03 15:13:03,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:03,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710615270] [2021-05-03 15:13:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:04,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710615270] [2021-05-03 15:13:04,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54332258] [2021-05-03 15:13:04,258 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 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 [2021-05-03 15:13:04,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:13:04,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:04,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:04,460 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 [2021-05-03 15:13:04,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:04,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:04,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:04,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-05-03 15:13:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:04,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:04,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:13:04,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500958371] [2021-05-03 15:13:04,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:13:04,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:04,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:13:04,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:13:04,496 INFO L87 Difference]: Start difference. First operand 1414 states and 4901 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) [2021-05-03 15:13:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:06,207 INFO L93 Difference]: Finished difference Result 2207 states and 7434 transitions. [2021-05-03 15:13:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:13:06,208 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 [2021-05-03 15:13:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:06,212 INFO L225 Difference]: With dead ends: 2207 [2021-05-03 15:13:06,212 INFO L226 Difference]: Without dead ends: 2188 [2021-05-03 15:13:06,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1125.1ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:13:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-05-03 15:13:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1423. [2021-05-03 15:13:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.469760900140647) internal successors, (4934), 1422 states have internal predecessors, (4934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4934 transitions. [2021-05-03 15:13:06,235 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4934 transitions. Word has length 24 [2021-05-03 15:13:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:06,235 INFO L480 AbstractCegarLoop]: Abstraction has 1423 states and 4934 transitions. [2021-05-03 15:13:06,235 INFO L481 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) [2021-05-03 15:13:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4934 transitions. [2021-05-03 15:13:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:06,237 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:06,237 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:06,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:06,437 INFO L428 AbstractCegarLoop]: === Iteration 102 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:06,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1227852840, now seen corresponding path program 10 times [2021-05-03 15:13:06,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:06,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302465341] [2021-05-03 15:13:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:06,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302465341] [2021-05-03 15:13:06,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885359266] [2021-05-03 15:13:06,723 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 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 [2021-05-03 15:13:06,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:13:06,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:06,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:06,921 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 [2021-05-03 15:13:06,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:06,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:06,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:06,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-05-03 15:13:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:06,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:06,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:13:06,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302252761] [2021-05-03 15:13:06,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:13:06,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:06,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:13:06,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:13:06,957 INFO L87 Difference]: Start difference. First operand 1423 states and 4934 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) [2021-05-03 15:13:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:08,601 INFO L93 Difference]: Finished difference Result 2159 states and 7292 transitions. [2021-05-03 15:13:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:13:08,602 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 [2021-05-03 15:13:08,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:08,606 INFO L225 Difference]: With dead ends: 2159 [2021-05-03 15:13:08,606 INFO L226 Difference]: Without dead ends: 2140 [2021-05-03 15:13:08,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1063.2ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:13:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-05-03 15:13:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1421. [2021-05-03 15:13:08,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.472535211267606) internal successors, (4931), 1420 states have internal predecessors, (4931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4931 transitions. [2021-05-03 15:13:08,626 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4931 transitions. Word has length 24 [2021-05-03 15:13:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:08,626 INFO L480 AbstractCegarLoop]: Abstraction has 1421 states and 4931 transitions. [2021-05-03 15:13:08,626 INFO L481 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) [2021-05-03 15:13:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4931 transitions. [2021-05-03 15:13:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:08,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:08,628 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:08,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:08,828 INFO L428 AbstractCegarLoop]: === Iteration 103 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:08,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:08,828 INFO L82 PathProgramCache]: Analyzing trace with hash 199702980, now seen corresponding path program 11 times [2021-05-03 15:13:08,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:08,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706706821] [2021-05-03 15:13:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:09,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706706821] [2021-05-03 15:13:09,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105377453] [2021-05-03 15:13:09,060 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 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 [2021-05-03 15:13:09,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:13:09,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:09,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:09,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:09,224 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 [2021-05-03 15:13:09,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:09,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:09,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:09,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-05-03 15:13:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:09,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:09,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-05-03 15:13:09,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497569724] [2021-05-03 15:13:09,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:13:09,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:09,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:13:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:13:09,292 INFO L87 Difference]: Start difference. First operand 1421 states and 4931 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) [2021-05-03 15:13:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:10,482 INFO L93 Difference]: Finished difference Result 2129 states and 7210 transitions. [2021-05-03 15:13:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:13:10,483 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 [2021-05-03 15:13:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:10,486 INFO L225 Difference]: With dead ends: 2129 [2021-05-03 15:13:10,487 INFO L226 Difference]: Without dead ends: 2120 [2021-05-03 15:13:10,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 802.5ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:13:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-05-03 15:13:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1430. [2021-05-03 15:13:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 3.470258922323303) internal successors, (4959), 1429 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 4959 transitions. [2021-05-03 15:13:10,508 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 4959 transitions. Word has length 24 [2021-05-03 15:13:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:10,508 INFO L480 AbstractCegarLoop]: Abstraction has 1430 states and 4959 transitions. [2021-05-03 15:13:10,508 INFO L481 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) [2021-05-03 15:13:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 4959 transitions. [2021-05-03 15:13:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:10,510 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:10,510 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:10,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-03 15:13:10,710 INFO L428 AbstractCegarLoop]: === Iteration 104 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:10,711 INFO L82 PathProgramCache]: Analyzing trace with hash 523289158, now seen corresponding path program 12 times [2021-05-03 15:13:10,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:10,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813373975] [2021-05-03 15:13:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:10,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813373975] [2021-05-03 15:13:10,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496703024] [2021-05-03 15:13:10,963 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 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 [2021-05-03 15:13:10,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:13:10,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:10,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:13:10,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:11,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:11,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:11,195 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 [2021-05-03 15:13:11,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:11,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:11,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:11,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-05-03 15:13:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:11,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:11,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-03 15:13:11,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526929279] [2021-05-03 15:13:11,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:11,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:11,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:11,373 INFO L87 Difference]: Start difference. First operand 1430 states and 4959 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) [2021-05-03 15:13:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:12,815 INFO L93 Difference]: Finished difference Result 2106 states and 7121 transitions. [2021-05-03 15:13:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:13:12,815 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 [2021-05-03 15:13:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:12,819 INFO L225 Difference]: With dead ends: 2106 [2021-05-03 15:13:12,819 INFO L226 Difference]: Without dead ends: 2097 [2021-05-03 15:13:12,819 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1161.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:13:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-05-03 15:13:12,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1444. [2021-05-03 15:13:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.469161469161469) internal successors, (5006), 1443 states have internal predecessors, (5006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 5006 transitions. [2021-05-03 15:13:12,840 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 5006 transitions. Word has length 24 [2021-05-03 15:13:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:12,840 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 5006 transitions. [2021-05-03 15:13:12,840 INFO L481 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) [2021-05-03 15:13:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 5006 transitions. [2021-05-03 15:13:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:12,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:12,842 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:13,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-03 15:13:13,042 INFO L428 AbstractCegarLoop]: === Iteration 105 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2085934016, now seen corresponding path program 13 times [2021-05-03 15:13:13,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:13,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658971312] [2021-05-03 15:13:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:13,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658971312] [2021-05-03 15:13:13,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260225460] [2021-05-03 15:13:13,259 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 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 [2021-05-03 15:13:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:13,434 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 [2021-05-03 15:13:13,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:13,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:13,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:13,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-05-03 15:13:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:13,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:13,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-05-03 15:13:13,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497256494] [2021-05-03 15:13:13,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:13:13,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:13:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:13:13,491 INFO L87 Difference]: Start difference. First operand 1444 states and 5006 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) [2021-05-03 15:13:14,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:14,590 INFO L93 Difference]: Finished difference Result 2058 states and 6984 transitions. [2021-05-03 15:13:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:13:14,590 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 [2021-05-03 15:13:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:14,594 INFO L225 Difference]: With dead ends: 2058 [2021-05-03 15:13:14,594 INFO L226 Difference]: Without dead ends: 2047 [2021-05-03 15:13:14,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:13:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2021-05-03 15:13:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1436. [2021-05-03 15:13:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.4717770034843207) internal successors, (4982), 1435 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4982 transitions. [2021-05-03 15:13:14,614 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4982 transitions. Word has length 24 [2021-05-03 15:13:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:14,614 INFO L480 AbstractCegarLoop]: Abstraction has 1436 states and 4982 transitions. [2021-05-03 15:13:14,614 INFO L481 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) [2021-05-03 15:13:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4982 transitions. [2021-05-03 15:13:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:14,616 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:14,616 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:14,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:14,817 INFO L428 AbstractCegarLoop]: === Iteration 106 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash 721304348, now seen corresponding path program 58 times [2021-05-03 15:13:14,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:14,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878471245] [2021-05-03 15:13:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:15,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878471245] [2021-05-03 15:13:15,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339692717] [2021-05-03 15:13:15,067 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 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 [2021-05-03 15:13:15,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:13:15,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:15,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:15,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:15,371 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 [2021-05-03 15:13:15,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:15,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:15,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:15,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-05-03 15:13:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:15,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:15,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:13:15,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118492410] [2021-05-03 15:13:15,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:13:15,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:13:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:13:15,415 INFO L87 Difference]: Start difference. First operand 1436 states and 4982 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) [2021-05-03 15:13:17,534 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-05-03 15:13:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:18,114 INFO L93 Difference]: Finished difference Result 2323 states and 7747 transitions. [2021-05-03 15:13:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 15:13:18,115 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 [2021-05-03 15:13:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:18,119 INFO L225 Difference]: With dead ends: 2323 [2021-05-03 15:13:18,119 INFO L226 Difference]: Without dead ends: 2281 [2021-05-03 15:13:18,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1996.6ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 15:13:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-05-03 15:13:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1453. [2021-05-03 15:13:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.4648760330578514) internal successors, (5031), 1452 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5031 transitions. [2021-05-03 15:13:18,141 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5031 transitions. Word has length 24 [2021-05-03 15:13:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:18,141 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 5031 transitions. [2021-05-03 15:13:18,141 INFO L481 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) [2021-05-03 15:13:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5031 transitions. [2021-05-03 15:13:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:18,143 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:18,143 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:18,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:18,343 INFO L428 AbstractCegarLoop]: === Iteration 107 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:18,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:18,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1985601830, now seen corresponding path program 59 times [2021-05-03 15:13:18,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:18,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923729588] [2021-05-03 15:13:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:18,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923729588] [2021-05-03 15:13:18,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129705055] [2021-05-03 15:13:18,665 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) [2021-05-03 15:13:18,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:13:18,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:18,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:19,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:19,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:13:19,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:13:19,067 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 [2021-05-03 15:13:19,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:19,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:19,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:19,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-05-03 15:13:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:19,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:19,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-03 15:13:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111288627] [2021-05-03 15:13:19,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:19,126 INFO L87 Difference]: Start difference. First operand 1453 states and 5031 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) [2021-05-03 15:13:21,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:21,697 INFO L93 Difference]: Finished difference Result 2240 states and 7477 transitions. [2021-05-03 15:13:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 15:13:21,697 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 [2021-05-03 15:13:21,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:21,701 INFO L225 Difference]: With dead ends: 2240 [2021-05-03 15:13:21,702 INFO L226 Difference]: Without dead ends: 2186 [2021-05-03 15:13:21,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2075.5ms TimeCoverageRelationStatistics Valid=374, Invalid=2932, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 15:13:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-05-03 15:13:21,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1458. [2021-05-03 15:13:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.465339739190117) internal successors, (5049), 1457 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5049 transitions. [2021-05-03 15:13:21,724 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5049 transitions. Word has length 24 [2021-05-03 15:13:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:21,725 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 5049 transitions. [2021-05-03 15:13:21,725 INFO L481 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) [2021-05-03 15:13:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5049 transitions. [2021-05-03 15:13:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:21,727 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:21,727 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:21,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:21,927 INFO L428 AbstractCegarLoop]: === Iteration 108 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:21,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1809060398, now seen corresponding path program 60 times [2021-05-03 15:13:21,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:21,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348057144] [2021-05-03 15:13:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:22,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348057144] [2021-05-03 15:13:22,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6877842] [2021-05-03 15:13:22,148 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 [2021-05-03 15:13:22,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:13:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:22,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:13:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:22,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:22,353 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 [2021-05-03 15:13:22,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:22,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:22,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:22,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-05-03 15:13:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:22,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:22,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 15:13:22,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446086494] [2021-05-03 15:13:22,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:13:22,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:22,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:13:22,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:13:22,490 INFO L87 Difference]: Start difference. First operand 1458 states and 5049 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) [2021-05-03 15:13:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:24,734 INFO L93 Difference]: Finished difference Result 2181 states and 7340 transitions. [2021-05-03 15:13:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 15:13:24,735 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 [2021-05-03 15:13:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:24,738 INFO L225 Difference]: With dead ends: 2181 [2021-05-03 15:13:24,738 INFO L226 Difference]: Without dead ends: 2141 [2021-05-03 15:13:24,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1689.8ms TimeCoverageRelationStatistics Valid=395, Invalid=2467, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 15:13:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-05-03 15:13:24,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1469. [2021-05-03 15:13:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.462534059945504) internal successors, (5083), 1468 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 5083 transitions. [2021-05-03 15:13:24,759 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 5083 transitions. Word has length 24 [2021-05-03 15:13:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:24,759 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 5083 transitions. [2021-05-03 15:13:24,759 INFO L481 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) [2021-05-03 15:13:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 5083 transitions. [2021-05-03 15:13:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:24,761 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:24,761 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:24,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-05-03 15:13:24,961 INFO L428 AbstractCegarLoop]: === Iteration 109 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:24,962 INFO L82 PathProgramCache]: Analyzing trace with hash 975321958, now seen corresponding path program 61 times [2021-05-03 15:13:24,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:24,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192060066] [2021-05-03 15:13:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:25,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192060066] [2021-05-03 15:13:25,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681440434] [2021-05-03 15:13:25,260 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) [2021-05-03 15:13:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:25,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:25,432 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 [2021-05-03 15:13:25,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:25,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:25,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:25,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-05-03 15:13:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:25,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:25,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-05-03 15:13:25,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001845996] [2021-05-03 15:13:25,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:13:25,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:25,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:13:25,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:13:25,506 INFO L87 Difference]: Start difference. First operand 1469 states and 5083 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) [2021-05-03 15:13:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:27,155 INFO L93 Difference]: Finished difference Result 2093 states and 7080 transitions. [2021-05-03 15:13:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:13:27,156 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 [2021-05-03 15:13:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:27,160 INFO L225 Difference]: With dead ends: 2093 [2021-05-03 15:13:27,160 INFO L226 Difference]: Without dead ends: 2067 [2021-05-03 15:13:27,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1185.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:13:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-05-03 15:13:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1471. [2021-05-03 15:13:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.4605442176870747) internal successors, (5087), 1470 states have internal predecessors, (5087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 5087 transitions. [2021-05-03 15:13:27,183 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 5087 transitions. Word has length 24 [2021-05-03 15:13:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:27,183 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 5087 transitions. [2021-05-03 15:13:27,183 INFO L481 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) [2021-05-03 15:13:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 5087 transitions. [2021-05-03 15:13:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:27,185 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:27,185 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:27,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-03 15:13:27,386 INFO L428 AbstractCegarLoop]: === Iteration 110 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash -846298030, now seen corresponding path program 14 times [2021-05-03 15:13:27,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:27,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125895959] [2021-05-03 15:13:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:27,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125895959] [2021-05-03 15:13:27,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069413960] [2021-05-03 15:13:27,621 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 [2021-05-03 15:13:27,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:13:27,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:27,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:13:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:27,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:27,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:13:27,971 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 [2021-05-03 15:13:27,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:27,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:27,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:27,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-05-03 15:13:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:28,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:28,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-03 15:13:28,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398499508] [2021-05-03 15:13:28,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:28,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:28,035 INFO L87 Difference]: Start difference. First operand 1471 states and 5087 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) [2021-05-03 15:13:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:30,502 INFO L93 Difference]: Finished difference Result 2308 states and 7673 transitions. [2021-05-03 15:13:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 15:13:30,502 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 [2021-05-03 15:13:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:30,506 INFO L225 Difference]: With dead ends: 2308 [2021-05-03 15:13:30,506 INFO L226 Difference]: Without dead ends: 2258 [2021-05-03 15:13:30,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1869.3ms TimeCoverageRelationStatistics Valid=381, Invalid=2589, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 15:13:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-05-03 15:13:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1475. [2021-05-03 15:13:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.4613297150610585) internal successors, (5102), 1474 states have internal predecessors, (5102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 5102 transitions. [2021-05-03 15:13:30,530 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 5102 transitions. Word has length 24 [2021-05-03 15:13:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:30,530 INFO L480 AbstractCegarLoop]: Abstraction has 1475 states and 5102 transitions. [2021-05-03 15:13:30,530 INFO L481 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) [2021-05-03 15:13:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 5102 transitions. [2021-05-03 15:13:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:13:30,532 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:30,532 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:30,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:30,733 INFO L428 AbstractCegarLoop]: === Iteration 111 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-05-03 15:13:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash 882373716, now seen corresponding path program 15 times [2021-05-03 15:13:30,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:30,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917535728] [2021-05-03 15:13:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:31,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917535728] [2021-05-03 15:13:31,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638600131] [2021-05-03 15:13:31,119 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:13:31,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:13:31,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:31,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:13:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:31,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:31,475 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 [2021-05-03 15:13:31,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:31,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:31,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:31,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-05-03 15:13:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:31,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:31,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-05-03 15:13:31,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158738801] [2021-05-03 15:13:31,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:31,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:31,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:31,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:31,591 INFO L87 Difference]: Start difference. First operand 1475 states and 5102 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:32,010 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-05-03 15:13:32,167 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-05-03 15:13:34,136 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-05-03 15:13:34,812 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-05-03 15:13:35,028 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-03 15:13:35,359 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 15:13:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:35,612 INFO L93 Difference]: Finished difference Result 2288 states and 7644 transitions. [2021-05-03 15:13:35,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 15:13:35,613 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 15:13:35,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:35,613 INFO L225 Difference]: With dead ends: 2288 [2021-05-03 15:13:35,613 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 15:13:35,613 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 3356.6ms TimeCoverageRelationStatistics Valid=572, Invalid=3588, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 15:13:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 15:13:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 15:13:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 15:13:35,614 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-05-03 15:13:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:35,614 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 15:13:35,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 15:13:35,614 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 15:13:35,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-05-03 15:13:35,818 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 03:13:35 BasicIcfg [2021-05-03 15:13:35,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 15:13:35,818 INFO L168 Benchmark]: Toolchain (without parser) took 138756.50 ms. Allocated memory was 388.0 MB in the beginning and 559.9 MB in the end (delta: 172.0 MB). Free memory was 367.4 MB in the beginning and 395.7 MB in the end (delta: -28.3 MB). Peak memory consumption was 145.4 MB. Max. memory is 16.0 GB. [2021-05-03 15:13:35,818 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 388.0 MB. Free memory is still 368.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:13:35,819 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.79 ms. Allocated memory is still 388.0 MB. Free memory was 367.4 MB in the beginning and 365.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:13:35,819 INFO L168 Benchmark]: Boogie Preprocessor took 18.51 ms. Allocated memory is still 388.0 MB. Free memory was 365.9 MB in the beginning and 364.9 MB in the end (delta: 986.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 15:13:35,819 INFO L168 Benchmark]: RCFGBuilder took 273.94 ms. Allocated memory is still 388.0 MB. Free memory was 364.9 MB in the beginning and 349.4 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-03 15:13:35,819 INFO L168 Benchmark]: TraceAbstraction took 138428.99 ms. Allocated memory was 388.0 MB in the beginning and 559.9 MB in the end (delta: 172.0 MB). Free memory was 348.9 MB in the beginning and 395.7 MB in the end (delta: -46.8 MB). Peak memory consumption was 128.6 MB. Max. memory is 16.0 GB. [2021-05-03 15:13:35,819 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 0.20 ms. Allocated memory is still 388.0 MB. Free memory is still 368.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.79 ms. Allocated memory is still 388.0 MB. Free memory was 367.4 MB in the beginning and 365.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.51 ms. Allocated memory is still 388.0 MB. Free memory was 365.9 MB in the beginning and 364.9 MB in the end (delta: 986.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 273.94 ms. Allocated memory is still 388.0 MB. Free memory was 364.9 MB in the beginning and 349.4 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 138428.99 ms. Allocated memory was 388.0 MB in the beginning and 559.9 MB in the end (delta: 172.0 MB). Free memory was 348.9 MB in the beginning and 395.7 MB in the end (delta: -46.8 MB). Peak memory consumption was 128.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 86]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 138296.7ms, OverallIterations: 111, TraceHistogramMax: 2, EmptinessCheckTime: 161.0ms, AutomataDifference: 82045.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 64.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7171 SDtfs, 16211 SDslu, 49754 SDs, 0 SdLazy, 59728 SolverSat, 5412 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25562.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4444 GetRequests, 1614 SyntacticMatches, 108 SemanticMatches, 2722 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24067 ImplicationChecksByTransitivity, 62308.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1475occurred in iteration=110, InterpolantAutomatonStates: 2361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1643.5ms AutomataMinimizationTime, 111 MinimizatonAttempts, 46056 StatesRemovedByMinimization, 109 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 460.0ms SsaConstructionTime, 1155.7ms SatisfiabilityAnalysisTime, 29799.4ms InterpolantComputationTime, 4508 NumberOfCodeBlocks, 4508 NumberOfCodeBlocksAsserted, 312 NumberOfCheckSat, 4298 ConstructedInterpolants, 137 QuantifiedInterpolants, 45406 SizeOfPredicates, 610 NumberOfNonLiveVariables, 7518 ConjunctsInSsa, 1973 ConjunctsInUnsatCore, 210 InterpolantComputations, 12 PerfectInterpolantSequences, 164/862 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 proved your program to be correct! Received shutdown request...